Thread: Newbie help

Originally Posted by PERRISCICABA

Disagree!
As a 7mm Rem Mag owner i must advise that with the factory twist rate in the commercial rifles it is in the hard way to get the total performance the projectile can produce. To achieve it you must load it "hot" enough so the velocity will carry the projectile at long distance without loose the spin and start to tumble.
I do understand that we have colleagues and friends in here that use it and is very successful but they may replace barrels more often than a "traditional" load will do to you.
Just my 0.02c.



Mac

(replace the barrel for a longer one and a faster twist (1-8.5" -1-9") and it will be the dream gun, or if you really want to go "ballistic" with your 300WM just replace the barrel for a little faster twist again(1-8.5" or 1-9") and use the berger 230gr, it will bit the 338 Lapua with 250gr all day(information from "Applied Ballistics")

180 Berger in a 7mm Mag at 2900/3000fps, is hardly going to wear out barrels at a prodidious rate, and if they don't keyhole at a 1000yds, they are probibly not tumbling.......... you might just be having some bad luck with yours - Short and Duley have been on opposing sides of .284 vs .30 for years, both work but the .30 takes a lot more omff to get the same ballistics to be in the same ballpark as the 7.

Originally Posted by 257weatherby

180 Berger in a 7mm Mag at 2900/3000fps, is hardly going to wear out barrels at a prodidious rate, and if they don't keyhole at a 1000yds, they are probibly not tumbling.......... you might just be having some bad luck with yours - Short and Duley have been on opposing sides of .284 vs .30 for years, both work but the .30 takes a lot more omff to get the same ballistics to be in the same ballpark as the 7.

Most rem mags I've seen can barely get those speeds with the 162. I don't know what you mean by heaps more omphh I use 79 grains of 2225 to get 2920 with the 215 berger is that 4 or 5 more grains than the rem mag?.
It carries 1000lbs of energy out to 1400 odd yards too which is handy.
Not a climber pissing contest I've had both , both kill shit and both require you to turn the nob on top of your scope.

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Originally Posted by Cartman

Most rem mags I've seen can barely get those speeds with the 162. I don't know what you mean by heaps more omphh I use 79 grains of 2225 to get 2920 with the 215 berger is that 4 or 5 more grains than the rem mag?.
It carries 1000lbs of energy out to 1400 odd yards too which is handy.
Not a climber pissing contest I've had both , both kill shit and both require you to turn the nob on top of your scope.

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You must have just struck some slow 7mms, with a 180 Berger,70gns ADI2217 gets me 2900fps, 73gns gets me 3050 - the 160/162 100fps faster, similar results in other peoples 7mm Mags I have worked up loads for.

Had a 300Wby I used to push 200gn Speers at over 3000fps comfortably, but silly amounts of powder to do it, compressed load of H1000, might be your 300 Mag doesn't like 2225 for speed, you using Federal 215's?

Omph : grunt/power, in this case powder load.