As much as I get after other people for thread necromancy...
munk said:
ps, I'd love to see what you do with the Hornady 350s. Lot's of people here use them for elk, and they were always one of my favorite bullets- tougher than the Speer 405, for instance.
I played around with these a bit on Sunday. No offense, but I didn't choose Hornady for the reputation; I chose them because they were selling the cheapest bullets in .458." The damned bullets alone cost more than many loaded cartridges do.
It was interesting.
From my notes:
350 gr. Hornady SP RN, once- or twice-fired Starline brass. Winchester LR primers. Moderate crimp applied on cannelure with Lee factory crimp die. Ammunition loaded on Lee dies. Powder used was pulled-down WC844 from demilled 5.56mm ammunition; the seller advised me to use H335 load data with it. I used load data from Richard Lee's Modern Reloading, starting with 51.2 grains.
51.2 - 1608, 1650, 1673, 1647, 1647.
51.5 - data lost
52.0 - 1683, 1692, 1702, 1657, 1647. Avg. 1676.
52.5 - 1691, 1642, 1647, 1673, 1675...and one hell of a fireball at the muzzle. I mean,
whoa. It got everyone's attention real fast. The report was also considerably louder on each shot, although there was no noticable difference in recoil. I think that 52 grains is all that little barrel will burn.
Observations:
All loads were equally accurate and turned in groups that looked remarkably similar: POI was several inches above my zero for the cast bullet loads at 100 yards and averaged around 2" vertical by 3" horizontal. Recoil was, erm,
brisk, and while shooting off the bench wasn't immediately painful, it was unpleasant. The WC844 is obviously a bit hotter than H335 but if one were to start with the minimum as I did, they wouldn't get into trouble with it. There were slight soot marks on the mouth of the 51.2 loads, with the heavier loads being soot-free; no cases displayed any obvious pressure signs. Lee's load data is known for being on the light side of conservative so this shouldn't be any surprise. Not that it affects me anyway, as 52 seems to be all that I can burn.
Some rough number crunching yields the following data on this load (based on Marlin's 7 lb. figure for their 1895GS):
Recoil energy: 24.7 ft-lbs. @ 15.1 fps
Recoil impulse: 3.53 lbs/sec.
ME: 2182 ft-lbs.
TKO Value: 38
As compared to the hottest 250-grain loading in the 375 H&H in the same book:
Recoil energy: 33.3 ft-lbs. @ 14.6 fps
Recoil impulse: 4.31 lbs/sec
ME: 4046
TKO Value: 36
And the Marlin does it at 3 lbs. less of overall weight, as I estimated my hypothetical H&H at 10 lbs. At 7 lbs., it would kick considerably harder but the other numbers wouldn't change. (Of course, the .375 can apply those numbers much more efficiently at a distance, but I don't want to talk about that right now.)
My goal was to have a sort of "light heavy" in a quick handling format that was accurate, reliable, and capable of taking anything in North America should the need arise, out to 200 yards. I believe that these goals have been met. All that remains to be done is the inevitable tinkering and to, you know, go and take something. I'll get to that when I get to that.