Originally Posted by
goodsteel
I am puzzled by this also. You say that the rifle is punishing with full house 130gr loads, but you enjoy the lesser recoil with the PP boolits? Yes, and it kills scopes with factory 130-gr boat-tails. I've handloaded for it before, using 4064 and IMR4350 with Speer 130-grain BT, and the recoil quickly got right up there around factory with midrange data from Speer #11. maybe I missed something but you need to be pushing these boolits as fast as copper jacketed boolits, thats the whole idea of PP rolling. Now if you are already at max pressure, dont worry with going any further and being unsafe. OK, think about it. I'm using up to 56 grains of RX22, one grain under book max for 150-grain SP jacketed with a flat base (Lyman #49). Their test barrel was two inches longer and was getting almost 2900 fps with 57 grains. My shortened Cruise Missiles weigh 149 grains with paper jacket and smear of lube. I'm figuring the pressure is OVER 50,000 CUP (NOT PSI), judging by the primer and the case head expansion. Common sense tells me that's at least 2800 fps, maybe more. The SLOW powder and soft, lubed boolit account for the manageable recoil the gun has with these loads. Also, I think the muzzle pressure is just about a low as it can get, the paper blasts out in a nice puff, going at most 15 feet in front of the muzzle. Observing the patch "puff" pattern, it's circular and rolls inward on itself like a mushroom cloud.
Large patch fragments are not good. That little bit of hold that the patch has as it unwraps, can throw your boolits in a spiral like 303guy says. Maybe I should use Teflon spray on the boolits before wrapping like PRS mentioned. Or not wrap so far up the nose. Or use a Loverin style boolit.
If you are still using the 100% cotton velum, lose it. Try green bar printer paper. I'm pretty sure that the boolit fairy sprinkles magic dust on the factory where this stuff is made, because it seems like every body ends up with a winning combination with this stuff. 10-4 on that, it would be an easy test. If you dont have access to any, shoot me a PM with your address and I will mail you some (I have a lifetime supply). I started out with velum but my opinion is that it is too strong for use with boolits and I had better luck with almost any other paper, except walmart receipt paper.
I am very impressed with your powder selection! I wish I had that many options! It seems like that IMR4350 would be a good one to try IMHO.