Here's some results from my last shooting session.
Rifle is a Marlin 336 in .30-30, with MicroGroove rifling. The barrel was foul (...as opposed to fowl...
) with both lead and copper, so this isn't benchrest stuff. A little history... this rifle performed poorly with generic .309" sized 170grn LaserCast bullets; they would hit the target, but I wouldn't even consider them 'hunting accurate.' This time, I used some lovely Montana Bullet Works .310" sized, gas checked bullets... the same bullet mold (Lyman 311041, I think) for both bullets, but sized differently, and the MBW's had the gas check installed. The jacketed bullets are the Nosler 170grn JSP Partition. Both bullets are over 28.8grn IMR3031, in prepped brass, with a roll crimp. Previous range sessions clocked the cast MBW bullet at 2000fps, I would expect the Nosler a little less. This is the same basic bullet and load I shot at Christmas in Nevada, which I posted about back on page 2 (I think.)
Red circle is the MBW cast bullet, the green circle is the Nosler, fired at 50yds of an informal rest (ammo can.) I just fitted this rifle with a SIG Romeo5 red dot sight, by request from the owner, who wants it to shoot piggies... my load development was to that end. I do NOT shoot red dot sights well, and even with this new R5 sight, the red dot obscured the target aiming point at 50yds; I know I could do better with a scope, and the rifle would likely do better with a clean bore.
The basic result is... the properly sized cast bullets shot just as well as the Nosler jacketed bullets, give or take.
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