24 gr 2400
- Thread starter gman
- Start date
fiver
Well-Known Member
whatever the 24grs gives me, I also use 22.5 and Dacron.
never bothered to run it over the chrono, it just worked with the sights and I went with it.
I don't think it is a direct replacement but I think that with the check shank so close in diameter I might be able to get away with 14-1500 fps.
I think I only have about 200 checks left, so if it sort of works without them I might take the gamble and try to cut the shank out of one cavity in the LEE mold and see how that goes.
if it shoots a bit slower then [shrug] I guess it shoots slower, and I will have to do something else for a load.
I 'm pretty positive I'm not going to shoot the rifle more and more as I get older at least not with stout recoil as part of the program.
never bothered to run it over the chrono, it just worked with the sights and I went with it.
I don't think it is a direct replacement but I think that with the check shank so close in diameter I might be able to get away with 14-1500 fps.
I think I only have about 200 checks left, so if it sort of works without them I might take the gamble and try to cut the shank out of one cavity in the LEE mold and see how that goes.
if it shoots a bit slower then [shrug] I guess it shoots slower, and I will have to do something else for a load.
I 'm pretty positive I'm not going to shoot the rifle more and more as I get older at least not with stout recoil as part of the program.
Ian
Notorious member
No. However, PC can increase the accurate velocity/pressure-handling potential of a bare-base bullet considerably. Some of what I've seen indicates ~20% velocity increase vs. plain based is a good number.
The coating takes care of the leakage thing under acceleration, replacing both lube and the hard base gasket a check provides so the bullet can take more pressure and velocity without the engraves washing out on the trailing edge. The accurate velocity limit then becomes the point at which you can no longer launch the bullet without gas-cutting the base band so badly that it starts affecting clean muzzle crown exit and gets tipped in an erratic fashion. If you use PC together with a compacting, granulated buffer, you can eliminate the gas check altogether, but only a relative few situations permit this. Straight-wall revolver cartridges are one of those situations....just sayin'.
Ian
Notorious member
Fiver, I haven't tried Dacron and PC yet, but I bet you can get 15-1600 easy without a check if you can get some kind of protection behind the bullet base, maybe even Dacron or Dacron holding a soda-carton wad under the bullet.
Remember my paper gas checks from Boolits years ago? I stamped discs out of file folder material and formed cups using a .30-caliber top punch and gas check seater (ejector stop) in a .311" sizing die. Then I put a dot of super glue on the cup, placed the cup in the die, and sized/lubed a bullet as with a normal gas check. Doing that got me a little increase in accurate velocity vs. same bullet with no paper check and shot clean as a whistle with no throat leading. I bet it would work 100 times better with a PC bullet since the PC will help the bullet grip the rifling and not leak, and the paper cup will help keep the base from getting gnawed up by gas.
Remember my paper gas checks from Boolits years ago? I stamped discs out of file folder material and formed cups using a .30-caliber top punch and gas check seater (ejector stop) in a .311" sizing die. Then I put a dot of super glue on the cup, placed the cup in the die, and sized/lubed a bullet as with a normal gas check. Doing that got me a little increase in accurate velocity vs. same bullet with no paper check and shot clean as a whistle with no throat leading. I bet it would work 100 times better with a PC bullet since the PC will help the bullet grip the rifling and not leak, and the paper cup will help keep the base from getting gnawed up by gas.
Bret4207
At the casting bench in the sky. RIP Bret.
Ben, I had a wonderfully accurate Siamese Mauser in 45-70, in of the Navy Arms models from back in the 70's. In a fit of stupidity, and with the added push of no food in the house, I sold it. I've since acquired a Lee Enfield #1 conversion, but it's just not anything close to what the Si was.
fiver
Well-Known Member
I remember you doing that.
I had tried the old paper milk carton checks in my 7 mauser a few times.
I tried holding them in place with the filer etc, I think the diameter was just a touch too small on them or I should have used a couple of them.
that trial was a dismal failure, I actually lost accuracy.
I can see this one working a bunch better with a slower powder a little filler and the P.C.
I have like an inch of engraving length to work with and the powder coat will help add to that with the T/L design.
using a buffer would be cheating..
I'm gonna try simple first and see what I get.
I had tried the old paper milk carton checks in my 7 mauser a few times.
I tried holding them in place with the filer etc, I think the diameter was just a touch too small on them or I should have used a couple of them.
that trial was a dismal failure, I actually lost accuracy.
I can see this one working a bunch better with a slower powder a little filler and the P.C.
I have like an inch of engraving length to work with and the powder coat will help add to that with the T/L design.
using a buffer would be cheating..
I'm gonna try simple first and see what I get.