here is some shooting feedback. please note that powder charges are for my rifle and lot of components. Work up in your own rifle.
At 100yds, sighted in with 57gr of H4831SC, then moved up in 1/2 grain increments. At 58.5grs, the group had two in one and another just out. Group size about 3/8". Not a bad start. At 59gr, definite stiff bolt and groups opened up.
Just went out yesterday and after shimming my scope for more elevation adjustment, I sighted in again at 100yds. The groups below are with 58.5gr shot at 180yds.
Group A was going from 100 to 180yds. Except for the shot out, not bad. Maybe me, maybe wind.
Group B definitely pulled one as indicated. Same type of pattern, ummm. Also, getting pressure signs. At least overall group size is not bad with two nice and tight.
Group C, went well and showed the vertical stringing typical of loads with a pressure problem. I am guessing that the scale was off a bit because I was getting pressure signs and stiff extraction.
Will try different brass and work up again. The PMC stuff is not standing up to the higher pressures I am runnning.
My guess is that with a load that balances the pressures, I should be able to get in the 1/2" range at 180yds. Not bad for a WWI action and a hunting bullet.
The barrel is 24" then muzzle brake. Kept is short because will be used as a walking LR rifle. Twist 1 in 9. I expect around 2900 to 3000fps. I am using the Hornady 140gr SST moly coated by me. Primer is Fed 210M but may try CCI BR2. Powder H4831SC and is just getting compressed so will not try a slower powder. Something like AA Magpro may be just the ticket but not available in Canada - easily.
Going to use the brass that has served me so well in many rifles - Lake City '06 brass. yep, this stuff shoots well for me and has proven very durable at high pressures.
Will post more details when I get the loads dialed in.
[ 07-28-2004: Message edited by: Jerry Teo ]