Yes, I got a chance to fire some more loads two weekends ago, the details are out in the shop right now, but I haven't forgotten this. I was waiting to post until I got a chance to mount some optics on my Marlin, the Pars Planitis in my eyes is flaring badly right now and I can't shoot anything better than about 4" at 50 yards right now, even with an aperture, but here's the short version:
Using RX7 and 8/10 grain Dacron, I was able to get 1580-1600fps and my dad was still get the same accuracy I was getting with some of the best original workups (borrowed his 66-yr old eyes), but it fell apart at 1650. The fastest load we tried was 1731 average and the groups were more like patterns, but still no leading. The Dacron, slow powder, paper check and Felix lube are a wonderful combination, but the boolits are way too soft for these speeds. I'm using air-cooled wheel weights aged to about 13.4 bhn, maybe I should cast up some more of these 311041s with water-quenched 50/50 and let them get to aging, see if I can't get the accuracy window up to at least 1700 fps. What the paper checks have shown me so far is a vast improvement over plain-base and checkless boolits in this particular gun, but the soft alloy has it's limits!
I got a Weaver scope base, just need to get the right size rings for this old Tasco I have and I'll be back in business for a while. I can still hit a Coke can at 50, but golf balls are impossible right now.
Gear