Does anyone have any pet loads that they would be willing to share for a .30-338 win mag using a 200 gr smk? Would kind of like to try a ball powder but haven't been able to find any load data for that using this heavy of a bullet. Any info would be appreciated.
Thousands of .30-.338 rounds have been fired in 600 and 1000 yard matches with this great old cartridge. Many people tried types of ball powder but it never produced accuracy as good as extruded powder. Top competitors settled on IMR4350 as the powder of choice. And standard primers always produced best accuracy; the milder ones were and still are excellent. The PMC large rifle primer may well be the best these days as it's a favorite of long range folks shooting the best scores. Best accuracy was/is with new cases or full-length sized ones that set the shoulder back about 6 thousandths and size the body all the way back to the belt; no step in front of the belt.
I wore out four .30-.338 barrels using IMR4350; 65 or 66 grains with 190 HPMK's, 64 or 65 with 200's in 1:12 twist barrels. They all shot under 6 inches at 1000 yards for 25 consecutive shots.
When testing loads, shoot at least 15 shots per test group at the longest range available. Don't use the smallest of several 3 or 5 shot groups at any range to base accuacy on. It doesn't matter how tiny the smallest few shot group is; all the other groups are larger which is why they're meaningless as far as the accuracy level is that one can count on all the time.
First off thanks for the information.
JE that is really close to the hunting load that I used last fall which was 72gr. h-4831 and 180gr tsx. This load shot somewhere around .5 inch with a little deviation, probably due to the fed 215 primers from what everyone tells me.
Bart, thank you as well. I haven't tried imr 4350 yet because I thought it might be too fast burning, but I'll certainly give it a try. The last load I've tried was 76grs of h-1000 with the 200 gr smk's, which is definately borderline, so I'm probably going to back it down to 72 and start working my way up again.
Thanks once again
Justin, many powders slower than IMR4350 will easily produce higher muzzle velocities for a given bullet weight. But I don't know of any powders that will produce better accuracy over the long haul. At the muzzle velocities a .30-.338 shoots bullets, I'd quickly give up 50 to 100 fps for much better accuracy.