More mysteries
07-19-2006 | 09:35 PM
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Nontypical Buck
Joined: Jan 2006
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More mysteries
Did some more shooting tonight. Tonight, I readjusted the windage of my rear sight. Got things pretty close.
One of the objectives was to see if I could do anything to better ignite the APP 3f. I decided to try a starter, a 2 grainpinch of pyro P first then 60 grains APP 3f. I shot. It was a pathetic little puff, hardly any recoil and it registered on the chrony a whopping 795 fps. I was so disgusted that I just put the APP away.
I had done some some shooting with the 270 ballets and 60 pyro P. Was getting almost 1500 fps with that arrangement, so I though I try the same volume of 3f Goex and see how that worked. Now with the 385's 75 grains 3f Goex yielded higher velocities than 75 grains Pyro P. So naturally, I thought I would see a little higher velocities with the 3f Goex. NOT! They averaged a mere 1263 and ranged from 1204 fps to 1329. An average energy of 956 ft. lbs. I was totally surprised.
So I thought I'd try 60 grains Pyro P just to see if the other day was a fluke. Four shots ranged from 1446 to 1503 and averaged 1479 fps or about 1312 ft-lbs. Major difference. The chrony has been such a great source of information. It can explain why things are happening, but it no doubt alerts one to things that would otherwise be unnoticed.
It was getting late so I tested a couple 385's with 75 grains 3f Goex. Two touching holes at 50 yards, one clocking 1311, the other 1332, right in thedistribution I clocked the other day. Averaging 1321 (1320 the other day) at 1492 ft.lbs.
This is what interested me.
With the 385 GP:
75 grains Pyro P yielded 1420 ft-lbs or 18.93 ft-lbs per grain.
75 grains 3f Goex yields 1492 ft-lbs or 19.89 ft-lbs per grain.
But with the 270 GP:
60 grains APP yielded 378 ft-lbs or 6.3 ft-lbs per grain.
60 grains 3f Goex yielded 956 ft-lbs or 15.93 ft-lbs per grain
60 grains Pyro P yielded 1312 ft-lbs or 21.86 ft-lbs per grain.
The Pyro P responded exactly the opposite of what I expect any powder to do. It was more efficient with a smaller projectile than a larger one. If the charge on the 385 GP were reduced to 60 grains, I would wager that the energy would be less than the 270 ballet with the same charge. I can't stand it, I'm gonna have see if thats the case.
Happy Hunting, Phil
One of the objectives was to see if I could do anything to better ignite the APP 3f. I decided to try a starter, a 2 grainpinch of pyro P first then 60 grains APP 3f. I shot. It was a pathetic little puff, hardly any recoil and it registered on the chrony a whopping 795 fps. I was so disgusted that I just put the APP away.
I had done some some shooting with the 270 ballets and 60 pyro P. Was getting almost 1500 fps with that arrangement, so I though I try the same volume of 3f Goex and see how that worked. Now with the 385's 75 grains 3f Goex yielded higher velocities than 75 grains Pyro P. So naturally, I thought I would see a little higher velocities with the 3f Goex. NOT! They averaged a mere 1263 and ranged from 1204 fps to 1329. An average energy of 956 ft. lbs. I was totally surprised.
So I thought I'd try 60 grains Pyro P just to see if the other day was a fluke. Four shots ranged from 1446 to 1503 and averaged 1479 fps or about 1312 ft-lbs. Major difference. The chrony has been such a great source of information. It can explain why things are happening, but it no doubt alerts one to things that would otherwise be unnoticed.
It was getting late so I tested a couple 385's with 75 grains 3f Goex. Two touching holes at 50 yards, one clocking 1311, the other 1332, right in thedistribution I clocked the other day. Averaging 1321 (1320 the other day) at 1492 ft.lbs.
This is what interested me.
With the 385 GP:
75 grains Pyro P yielded 1420 ft-lbs or 18.93 ft-lbs per grain.
75 grains 3f Goex yields 1492 ft-lbs or 19.89 ft-lbs per grain.
But with the 270 GP:
60 grains APP yielded 378 ft-lbs or 6.3 ft-lbs per grain.
60 grains 3f Goex yielded 956 ft-lbs or 15.93 ft-lbs per grain
60 grains Pyro P yielded 1312 ft-lbs or 21.86 ft-lbs per grain.
The Pyro P responded exactly the opposite of what I expect any powder to do. It was more efficient with a smaller projectile than a larger one. If the charge on the 385 GP were reduced to 60 grains, I would wager that the energy would be less than the 270 ballet with the same charge. I can't stand it, I'm gonna have see if thats the case.
Happy Hunting, Phil
07-19-2006 | 09:39 PM
#2
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Nontypical Buck
Joined: Jan 2006
Posts: 1,470
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RE: More mysteries
ORIGINAL: Pglasgow
The chrony has been such a great source of information. It can explain why things are happening, but it no doubt alerts one to things that would otherwise be unnoticed.
The chrony has been such a great source of information. It can explain why things are happening, but it no doubt alerts one to things that would otherwise be unnoticed.
