How far off the lands?

fishead · 11-22-2010, 10:16 AM

I am about to load some midway dogtowne bullets 55 gr FBHP for a winchester 22-250 coyote mod 70, my question is how far off the lands do I start, or can it be touching the bullet?any one got a good recipe for this bullet? thanks guys

11-22-2010, 10:47 AM

I like to be 0.01"-0.03" or more away to start. I have found great loads deep also close to 0.5" on some mag calibers.

with Barnes bullets, I start usually deep 0.05" from lands.

Big Z · 11-22-2010, 01:21 PM

Now this is just speaking in general, but I usually start at the lands, and if need be I'll back off in .01" increments, but usually I'm within .03"

jeepkid · 11-22-2010, 01:25 PM

Quote:

Originally Posted by fishead

I am about to load some midway dogtowne bullets 55 gr FBHP for a winchester 22-250 coyote mod 70, my question is how far off the lands do I start, or can it be touching the bullet?any one got a good recipe for this bullet? thanks guys

Probably have trouble getting to the lands with that bullet...but if they are touching or jammed watch for pressure spikes...

7MMXBOLT · 11-23-2010, 02:38 AM

IMO, you are better off starting .010 - .020 off the lands as every rilfe is different. Find a load that groups good and move the seating to see if it improves. What works in one rifle may be a dangerous situation in another. As "jeepkid" pointed out, you run the risk of over pressure.

Just not good common sense to start off touching the lands from the start! Why risk it?

Ridge Runner · 11-23-2010, 04:43 PM

start 10 off and see how it shoots, tweak it both ways and check the results, let your rifle tell you what it wants.

above group was fired with 140 gr bergers seated .030 off the lands, and believe it or not the range was 752 yardsmy other long range rifle likes them jammed .006 into the rifleingRR

Sniper151 · 11-23-2010, 05:19 PM

I've found that .027 seems to be an all around good seating depth. I'll lube an empty bullet that I want to use in a sized, empty brass. Close the bolt slowly four times pulling the bullet out before each chambering and guage the depth each time then back it down to .027 from the lands. It seems to work well on all my reloads with no feeding problems and very good accuracy.

11-23-2010, 07:33 PM

Quote:

Originally Posted by Sniper151

I've found that .027 seems to be an all around good seating depth. I'll lube an empty bullet that I want to use in a sized, empty brass. Close the bolt slowly four times pulling the bullet out before each chambering and guage the depth each time then back it down to .027 from the lands. It seems to work well on all my reloads with no feeding problems and very good accuracy.

Let me get this right, your saying your able to seat a bullet in a sized case with the bolt alone? One if you able too, you would be jamming the bullet in the rifling .05" or more, two, you probably wouldn't be able to extract it without pulling the bullet out of the case.

SecondChance · 11-23-2010, 08:15 PM

Quote:

Originally Posted by bigcountry

Let me get this right, your saying your able to seat a bullet in a sized case with the bolt alone? One if you able too, you would be jamming the bullet in the rifling .05" or more, two, you probably wouldn't be able to extract it without pulling the bullet out of the case.

Thats what I was thinking. I start out at .005 out, load 5 and send them. See what happens. Load another 5 at .003, send them. If it does not get better, load 5 at .007, send them and see what happens. Go from there. Range just outside back door of house.

7MMXBOLT · 11-24-2010, 12:57 AM

I use my chambers on all my bolt guns as a OAL gage like "sniper" does but a little differently. Instead, I cut 2 slits down the neck of a empty fired case and insert the bullet of choice into the neck. long enough so when the chamber is closed the bullet gets seated deeper into the case to your chambers length off the ojive of the bullet. Because of the slits in the neck, I can adjust the neck tension with my fingers so that the bullet won't pull out after chambering the cartridge. Chamber the round enough times until I can get a consistant OAL. This tells me at what length the bullet touches the lands. Take that measurement and back off however far you want for your seating depth to be. Best way to do this is to use a case that has been fired in the said rifle a couple times without resizing the shoulder or the body. If you try using a sized case your not going to get an accurate measurement of your chamber nor would you be able to push the bullet into the neck with your fingers.

To cheap to buy a Hornady/Stonypoint OAL gage I guess!