Preacher
03-12-2006, 03:22 PM
Hey folks; just signed on and this sight looks to be one of the better forums I've seen. A lot of good info.
So...As a fledgling caster I've done rather well with revolver bullets and accuracy; mainly cast and load for 357, 44 Mag, and 45 Colt. But with my Marlin 336 T (circa 1980's) in 30-30 and commercial cast (no GC) 165 gr. flat nose bullets, I've been stumped. Quit on this project years ago but finding this sight has renewed my interest.
Here's my delema: The bullets are made by National Bullet Co. and look like good stuff. I used 16.0 gr. of SR 4759 powder sparked by R-P 9 1/2 primers. OAL was 2.542". Velocity was a chronographed 1561 fps. I also used 8.0 & 8.5 gr. of Unique with the same boolit at about 1250 fps. Accuracy was very good at 50 yd. most in about an inch or so. The problem was the first shot out of a cool, or clean, or conditioned (meaning fowled) but cool, barrel would throw the boolit up to 6 inches away from point of aim with the remaining boolits going into a nice group right where they were supposed to be landing. Happened every time which meant it was a bust for hunting. If I kept on shooting there was no problem. But if I quit for any length of time the first shot would again be that crazy flyer, then things would fall back into place. Haven't a clue as to what's going on here. Any insight or advice would be appreciated as I would really like to get this old marlin shooting lead. Thanks much.
Preacher
So...As a fledgling caster I've done rather well with revolver bullets and accuracy; mainly cast and load for 357, 44 Mag, and 45 Colt. But with my Marlin 336 T (circa 1980's) in 30-30 and commercial cast (no GC) 165 gr. flat nose bullets, I've been stumped. Quit on this project years ago but finding this sight has renewed my interest.
Here's my delema: The bullets are made by National Bullet Co. and look like good stuff. I used 16.0 gr. of SR 4759 powder sparked by R-P 9 1/2 primers. OAL was 2.542". Velocity was a chronographed 1561 fps. I also used 8.0 & 8.5 gr. of Unique with the same boolit at about 1250 fps. Accuracy was very good at 50 yd. most in about an inch or so. The problem was the first shot out of a cool, or clean, or conditioned (meaning fowled) but cool, barrel would throw the boolit up to 6 inches away from point of aim with the remaining boolits going into a nice group right where they were supposed to be landing. Happened every time which meant it was a bust for hunting. If I kept on shooting there was no problem. But if I quit for any length of time the first shot would again be that crazy flyer, then things would fall back into place. Haven't a clue as to what's going on here. Any insight or advice would be appreciated as I would really like to get this old marlin shooting lead. Thanks much.
Preacher