05 March 2006, 04:18
gixxerMy 375 RUM shoots flatter than my Wife's 243!?
So, I am doing bullet trajectory shooting for load development at the range, and to my surprise my 375 zeroed @ 100yd, shoots 9" low @ 300, while the wife's "tool"(think like your at work, and you call the dumbass co worker a tool) shoots 14" low. Just felt like tellin somebody, it surprised me. I was shooting 260gr Accubonds in the 375, and 100gr Win factory ammo.
I was trying to shoot football helmets @ 570yd with the 243, and I had to crank in HUGE amounts of elevation. I believe I had to dial in about 10 mils of holdover till I got even close. The 375 took about either 6 or 7 mils, didnt write it down. Still didnt hit the damn thing, the wind was gusting from 10 to 15 the whole time, and shooting the safari rifle didnt exactly make things easier.
BTW the reason why I dislike the wife's rifle is it weighs like 5#, and the trigger pull on it is like 7#.
Dont ask why I have a mil dot scope on my 375. It is pretty cool to use though.
05 March 2006, 18:22
vapodogThere's another thread somewhere asking if the .375 H&H is a 300 yard rifle. Granted the .375 RUM is a shovelfull more but even the H&H variant is surprisingly flat shooting.
BTW....you really ought to do the wife a favor and fix that trigger for her. She'll pay you back some how I'm sure.
06 March 2006, 08:51
smallfryGixxer... amen I have a 378 wby 24" with a 1-10" twist... try shooting the 270 TSX at 3100. Alittle harder to spot then a 243 though.

07 March 2006, 03:18
DKingThere's got to be an error somewhere in those numbers. If not I definately need to get one of those!
375 RUM 100 yard zero 9" low at 300 yards = 3 MOA correction for 300 yards. This is possible I'd guess at ~.480 BC, 4000 ASL, 59 degrees, 3200 FPS.
243 Win (assume 100 yard zero) 14" low at 300 yards = 4.7 MOA correction for 300 yards. This is probably correct with a heavy(ier) bullet.
At 575 yards the same 375 RUM now needs ~6.5 MIL (= ~23.5 MOA) or ~134 inches of holdover. That'd put it about .480 BC, 4000 ASL, 59 degrees, ~2150 FPS.
But it could be ~6.5 MOA vice MIL but that'd only be ~38 inches of holdover making this combination one extremely flat shooter... ~ .480 BC, 4000 ASL, 59degrees and 3,700 FPS.
I'm thinking that for the 375 RUM a 575 yard trajectory correction starting with a 100 yard zero using a 260 Accubond will be about 10 to 11 MOA.
07 March 2006, 03:30
gixxerMr King, I believe you might be correct. Reason why is I doubt a 260 AB could retain 3200FPS @ 300 especially beings that I am not getting anywhere 3200FPS MV! Mistake in my information possibly. You know what that means? I HAVE to go back on Friday and shoot 100-500yd AGAIN, just to make sure. Damn, breaks my heart when I have to shoot my rifle!!

07 March 2006, 07:02
DKingYeah, shooting is a terrible thing!

I believe I'll join in the fun and make a trip out this coming weekend too.
I have a long(er) barreled 375H&H that I shoot the 260 AB through, they're a good bullet for long(er) distance shooting. Data for my rifle and load puts me about 13.5 to 14 MOA at 575 yards.