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375 h&h, IMR 4064, 250gn TTSX

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31 January 2014, 10:13
gohip2000
375 h&h, IMR 4064, 250gn TTSX
I don't have a chronograph and was wondering if anyone has chrono'ed this combination.

69gn of 4064 gave me the best accuracy, but then groups started tightening up at 73gn again with no pressure signs.

I'm trying to decide if I should just stick with 69gn or try to dial in at the 73-74gn range for better velocity.

It being shot out of a 25" factory barrel
31 January 2014, 16:53
p dog shooter
I always go with the accuracy first.

Go buy a chronograph.
31 January 2014, 18:40
Rusty
According to my QuickLoad 73 is too hot. 69 fills 103.8% of the case and give you 2792 FPS.
I'd stay away from the 73. Just my opine.

67 grains will give you 2720 and fill 100.8% of the case and a safer pressure.


Rusty
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31 January 2014, 23:26
gohip2000
i was going off the old barnes manual and it gave 2678 with 69gn and the 250 X bullet and a max load of 74gn. i didn't start getting compressed loads until 72gn
69 gn was mild recoil and fills about 90% of the case. I should probably just stick with it.
01 February 2014, 00:05
BNagel
My old data:


.375 Weatherby
250-grain Sierra Game King
GM215M primer
73 grains IMR 4064
2680 fps
Brno ZKK 602 rechambered
+3" @ 100 / +1 to 4" @ 200 / -7" ave. @ 300

73 grains for H&H is too hot!

2 cents there (but 25+ bucks in components)


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