Your onto it!
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With the long throat in the 7x57's, it means you have to ignore the book and just load them up till they have the correct velocity. ""Correct velocity"" in a Mauser 98 or a modern rifle, is 2900fps with a
140 and 2800 with 154g. 160 grains at 2600 fps. (And if you think that doing the job of a .280 or a 7x64, then yeeees...your right.)
My Brno 21 has a long throat and with H4350 I have to load 5 grains over max to get 2930 fps.
7x57 data is essentially worthless. I use 7mm08 max data as starting loads for the 7mm Mauser, since that case has a little bit less capacity.
Hornady 154 SP’s with long bearing surface act like 160’s in my rifle. Max I can go to without pressure signs is 2650 fps. 760 @ 50 gns. Other cases and powders may give more but 760 seems to one of the top powders for this case.
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140x 6mm creedmoor, 2209, 450s, lapua brass and 108s
50x 308, 2206h, 210m, lapua brass and 168s
Using handloaders facilites is worth the annual fee well and truly, 2x amp annealers, 2x charge masters, heaps of presses and never had anyone else in the room at the same time. Plus the added benefit of walking 10m to a 100m fully covered shooting range with targets, rests, benches all ready to go
What barrel length and velocity are you getting with the 6mmCM.
Experience. What you get just after you needed it.
A very tame load for PRS as you can’t exceed 3200fps.
3100 and it’s 30” as it’s on a bullpup desert tech so overall length isn’t bad
Some 175 targex for the 3006, using Belmont 763, next to check the rings and scope then re zero the unique as it was dropped during a hare shoot and missed everything afterwards
Today I'll be converting 200 factory primed 7.62x39 steel Norinco cases to 6.5 Grendel.....easy as, & makes shooting the Grendel a lot more pleasurable when one doesn't have to worry about cost of shells. Just flick them out into the grass & keep chasing the goats.
I'd like to try them on Wally jumpers to see how effective the cal was.
Steel reloading is just as easy as brass.....but cheaper.
Greetings @Micky Duck,
As far as I am aware the steel cases are not rated for higher pressure than brass. They are just a cheaper material for cases. Cases from different manufacturers could be quite different in hardness and more important ductility. I doubt if reloadability was high on the manufacturers list of importance.
Regards Grandpamac.
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