Busta' Stainless Vent Liner
06-07-2012 | 03:15 PM
#1
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
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From: Rapid City, South Dakota
Busta' Stainless Vent Liner
Busta mailed to me a couple of these vent liner. They arrived here with a 0.028" flash hole.
The first was installed in the Mountaineer, and 48 shots taken, over two days. The flash hole eroded from 0.028" to 0.030".
This morning i installed the other vent into the X7, and went up and shot 31 shots. Returning home, i began my normal prodedure of cleaning the breech plug. First the vent liner was removed. The flash hole was measured at 0.029". Then a 5/32" drill was spun using a drill motor and used to drill through the carbon in the flash channel. When the 5/32" drill encountered the carbon deposit right at the end of the vent, it proceeded as though it was drilling hardened steel. The carbon deposit was thick, and had a small hole though it about the same diameter as the flash hole of the vent. Even though the drill was spinning at high speed, and i was leaning on the motor, it took some doing to drill though the carbon. This i had never experienced before yesterday, when the same thing happened when i cleaned the Mountaineer breech plug.
The vent liner(s) did not have a lead on the primer end. The vent liners i have been using lately, all had leads. The carbon deposit in the plugs when using those other vents had been a way easier to drill through. It seemed a lead should be created in this vent liner. It was done.
This afternoon, the vent liner was installed in the breech plug, the breech plug installed into the rifle, and a trip was made to the hills. Nineteen shots were taken whilst standing on my hind legs, and using a bipod. The shooting was stopped, because it began a lightning storm. I didn't feel comfortable loading the rifle with the ram rod pointed to the sky. Returning home, the vent liner with the lead was removed leaving behind a carbon deposit with a large hole in it similar to the diameter of the lead. The carbon was readily removed with the powered 5/32" drill.
What a difference the lead made in ease of cleaning. The carbon was so much easier to drill out, this afternoon, compared to this morning.
After 50 shots through the second Busta' stainless vent liner, it's flash hole is now 0.029".
The target showing the last 19 shots, was at about 102, or maybe 103 yard, shot standing, using a bipod. The load was 110g BH, 300g 44 caliber XTP, green crush rib sabot, W209 primer.
The first was installed in the Mountaineer, and 48 shots taken, over two days. The flash hole eroded from 0.028" to 0.030".
This morning i installed the other vent into the X7, and went up and shot 31 shots. Returning home, i began my normal prodedure of cleaning the breech plug. First the vent liner was removed. The flash hole was measured at 0.029". Then a 5/32" drill was spun using a drill motor and used to drill through the carbon in the flash channel. When the 5/32" drill encountered the carbon deposit right at the end of the vent, it proceeded as though it was drilling hardened steel. The carbon deposit was thick, and had a small hole though it about the same diameter as the flash hole of the vent. Even though the drill was spinning at high speed, and i was leaning on the motor, it took some doing to drill though the carbon. This i had never experienced before yesterday, when the same thing happened when i cleaned the Mountaineer breech plug.
The vent liner(s) did not have a lead on the primer end. The vent liners i have been using lately, all had leads. The carbon deposit in the plugs when using those other vents had been a way easier to drill through. It seemed a lead should be created in this vent liner. It was done.
This afternoon, the vent liner was installed in the breech plug, the breech plug installed into the rifle, and a trip was made to the hills. Nineteen shots were taken whilst standing on my hind legs, and using a bipod. The shooting was stopped, because it began a lightning storm. I didn't feel comfortable loading the rifle with the ram rod pointed to the sky. Returning home, the vent liner with the lead was removed leaving behind a carbon deposit with a large hole in it similar to the diameter of the lead. The carbon was readily removed with the powered 5/32" drill.
What a difference the lead made in ease of cleaning. The carbon was so much easier to drill out, this afternoon, compared to this morning.
After 50 shots through the second Busta' stainless vent liner, it's flash hole is now 0.029".
The target showing the last 19 shots, was at about 102, or maybe 103 yard, shot standing, using a bipod. The load was 110g BH, 300g 44 caliber XTP, green crush rib sabot, W209 primer.
06-07-2012 | 08:12 PM
#3
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
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From: Rapid City, South Dakota
Chances are what i think is a way off, but you asked.
First, i don't think the carbon deposit is softer. I think the reason it is easier to remove is because of two other reasons.
First, the lead allows for a smoother flow of primer gases into the flash hole, so fewer particles accumulate at the end of the vent liner. The thickness of the carbon build-up is less when there is a lead. A thinner layer of hard carbon makes it easier for the drill to cut through, because there is less material for the drill to remove.
Second, the hard carbon build has a hole through it, virtually the size of the flash hole when there is no lead. When there is a lead, the hole through the carbon is near the diameter of the lead, which is much much larger than the flash hole diameter. This larger opening makes it easier for the drill to penetrate through the carbon, because there is less material for the drill to remove.
Essentially, the lead makes the flash hole less of a blockage, which means less carbon stays at the beginning of the flash hole.
Right or wrong, it makes sense to me. Right or wrong, it even sounds good to me. Hopefully there is some truth in this answer.
First, i don't think the carbon deposit is softer. I think the reason it is easier to remove is because of two other reasons.
First, the lead allows for a smoother flow of primer gases into the flash hole, so fewer particles accumulate at the end of the vent liner. The thickness of the carbon build-up is less when there is a lead. A thinner layer of hard carbon makes it easier for the drill to cut through, because there is less material for the drill to remove.
Second, the hard carbon build has a hole through it, virtually the size of the flash hole when there is no lead. When there is a lead, the hole through the carbon is near the diameter of the lead, which is much much larger than the flash hole diameter. This larger opening makes it easier for the drill to penetrate through the carbon, because there is less material for the drill to remove.
Essentially, the lead makes the flash hole less of a blockage, which means less carbon stays at the beginning of the flash hole.
Right or wrong, it makes sense to me. Right or wrong, it even sounds good to me. Hopefully there is some truth in this answer.
06-08-2012 | 11:18 AM
#6
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
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From: Rapid City, South Dakota
The lead was made using a #1 center drill. Note that the left end of the drill busted off a while ago whilst making a lead in one of my holo-krome vent liners.
To make the lead in just the one vent liner, i kinda free handed it, instead of setting up a jig
It is kinda hard to get a precise measurement, but i believe the lead is over 1/8" long.
Taking into account the depth of the lead, the depth of the socket, and the length of the vent liner, it seems the length of the flash hole is less than 1/8". It could be one should make the lead with the end of the center drill that is busted off.
It doesn't seem to me, the carbon is 'EXTRA HARD' without the lead. Rather there is more of it when there is no lead. The following photo kinda show what i mean.
The first photo show the vent liner in place. The flash hole is now 0.030", after shooting 29 shots this morning. The second photo shows the hole through the carbon. It is significantly larger than the flash hole. Before the lead was formed, the hole through the carbon was the same as the flash hole, near the end of the vent liner. The carbon is easier to remove now, because the 'hard carbon' has a larger hole through it, and seemingly is less deep. Most of the flame channel is more open than the area adjacent to the end of the vent liner. The last photo shows the plug with an open flame channel after the 5/32" drill was motored through it.
The shooting this morning was done standing with the help of a bipod. The rifle was loaded at the truck, then a 25 yard hike away was taken to where the photo was taken. Between each shot the shooter walked 50 yard. Since the shooting was done down the trail, i figured to find several sabot. Only 3 were found. How the bottom of the sabot, rolled back on itself is a mystery to me.
Most of the shot are visible on the target, and were taken from 125 yard.
The load for most shots was 110g BH, 300g 44 caliber XTP, crush rib sabot, W209 primer. The rifle was the X7 sans qla. The hole in the bottom target was made first on a cold clean barrel at 200 yard in the cool of the morning using a 300g Deep Curl.
After a time shooting at paper became boring, so a box was set out at 150 yard, and filled with water.
The cool thing about smucking boxes filled with water in the wax paper, is they explode, but don't scatter. Most of this box was right there in one place, with a very few pieces near by.
This Busta' stainless vent now has 79 shots through, and the flash hole is 0.030".
To make the lead in just the one vent liner, i kinda free handed it, instead of setting up a jig
It is kinda hard to get a precise measurement, but i believe the lead is over 1/8" long.
Taking into account the depth of the lead, the depth of the socket, and the length of the vent liner, it seems the length of the flash hole is less than 1/8". It could be one should make the lead with the end of the center drill that is busted off.
It doesn't seem to me, the carbon is 'EXTRA HARD' without the lead. Rather there is more of it when there is no lead. The following photo kinda show what i mean.
The first photo show the vent liner in place. The flash hole is now 0.030", after shooting 29 shots this morning. The second photo shows the hole through the carbon. It is significantly larger than the flash hole. Before the lead was formed, the hole through the carbon was the same as the flash hole, near the end of the vent liner. The carbon is easier to remove now, because the 'hard carbon' has a larger hole through it, and seemingly is less deep. Most of the flame channel is more open than the area adjacent to the end of the vent liner. The last photo shows the plug with an open flame channel after the 5/32" drill was motored through it.
The shooting this morning was done standing with the help of a bipod. The rifle was loaded at the truck, then a 25 yard hike away was taken to where the photo was taken. Between each shot the shooter walked 50 yard. Since the shooting was done down the trail, i figured to find several sabot. Only 3 were found. How the bottom of the sabot, rolled back on itself is a mystery to me.
Most of the shot are visible on the target, and were taken from 125 yard.
The load for most shots was 110g BH, 300g 44 caliber XTP, crush rib sabot, W209 primer. The rifle was the X7 sans qla. The hole in the bottom target was made first on a cold clean barrel at 200 yard in the cool of the morning using a 300g Deep Curl.
After a time shooting at paper became boring, so a box was set out at 150 yard, and filled with water.
The cool thing about smucking boxes filled with water in the wax paper, is they explode, but don't scatter. Most of this box was right there in one place, with a very few pieces near by.
This Busta' stainless vent now has 79 shots through, and the flash hole is 0.030".
06-12-2012 | 09:15 AM
#8
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
Likes: 0
From: Rapid City, South Dakota
Yesterday the vent was installed into a Knight Extreme. After 22 shot; a total of 119 shot, the flash hole was 0.031".
This morning the vent was installed in the Dream Season. Today 25 shot were made for a total of 144 through the vent. The flash hole is now 0.032"
The load was the same for both rifle. 300g Deep Curl, 100g BH, W209 primer. The long Harvester sabot was used in the Extreme; the crush rib was used in the Dream Season.
Both rifle have a peep sight mounted with 0.150" aperture. All shots were taken standing up utilizing a tall bipod. After years of practice, it may be, the shooter has learned not to 'jerk' the trigger whilst the sight is waving around the target. Twice the shooter forgot to load a new primer, and twice, the trigger pull was a smooth squeeze.
It could be the Dream Season will make it's first kill, this upcoming muzzy season. The hunter must learn to squeeze the trigger without the best of rests, whilst shooting at possible venison in the freezer. Usually the hunter' hands, arms, and legs want to shake when aiming at meat; hopefully when shaking, wobbling, and aiming, the hunter can squeeze the trigger.
This morning the vent was installed in the Dream Season. Today 25 shot were made for a total of 144 through the vent. The flash hole is now 0.032"
The load was the same for both rifle. 300g Deep Curl, 100g BH, W209 primer. The long Harvester sabot was used in the Extreme; the crush rib was used in the Dream Season.
Both rifle have a peep sight mounted with 0.150" aperture. All shots were taken standing up utilizing a tall bipod. After years of practice, it may be, the shooter has learned not to 'jerk' the trigger whilst the sight is waving around the target. Twice the shooter forgot to load a new primer, and twice, the trigger pull was a smooth squeeze.
It could be the Dream Season will make it's first kill, this upcoming muzzy season. The hunter must learn to squeeze the trigger without the best of rests, whilst shooting at possible venison in the freezer. Usually the hunter' hands, arms, and legs want to shake when aiming at meat; hopefully when shaking, wobbling, and aiming, the hunter can squeeze the trigger.
06-13-2012 | 10:51 AM
#9
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
Likes: 0
From: Rapid City, South Dakota
This morning more practice. Nineteen shots standing with the help of a tall bipod. Same load, and same rifle as yesterday.
Range was 100 yard, and the early morning air was cool, crisp, and still. Came back home before 08:30.
Busta' stainless vent now has a total of 163 shots through. The flash hole is now 0.032".
I should know how much a Holo-Krome vent would erode after 163 shots, but i confess to keeping poor counts of spent primers from each different rifle. A Guess...........................i want to say 0.035".
Whilst retrieving the target, these bullet were found up on the hill behind.
Range was 100 yard, and the early morning air was cool, crisp, and still. Came back home before 08:30.
Busta' stainless vent now has a total of 163 shots through. The flash hole is now 0.032".
I should know how much a Holo-Krome vent would erode after 163 shots, but i confess to keeping poor counts of spent primers from each different rifle. A Guess...........................i want to say 0.035".
Whilst retrieving the target, these bullet were found up on the hill behind.
06-17-2012 | 09:55 AM
#10
Thread Starter
Nontypical Buck
Joined: Aug 2008
Posts: 3,732
Likes: 0
From: Rapid City, South Dakota
This morning some more shooting was done through Busta' vent liner. Seventeen shots were made, which makes a total of 204 shots; the flash hole is now 0.033".
There was a very slight breeze, so it seemed some of the shots could be at 200 yard. Shots were taken, and the scope adjusted. The last three shots landed in the red.
The rifle used today was the 45 caliber Omega. The load was 200g SST, 115g BH, blue sabot, W209 primer.
There was a very slight breeze, so it seemed some of the shots could be at 200 yard. Shots were taken, and the scope adjusted. The last three shots landed in the red.
The rifle used today was the 45 caliber Omega. The load was 200g SST, 115g BH, blue sabot, W209 primer.