Sniper Country Duty Roster collective wisdom

Ballistics - 300WM loads and bullets:

Just remember, always put safety first.
DO NOT accept a load provided here, or anywhere else, without reserve.  Take into account that it may not be safe in YOUR rifle, or that there could have been a typing mistake.  Always refer to you reloading manuals, and if you afterwards JUST HAVE TO use somebody else's loads, always reduce by at least 10% and work up in YOUR rifle, under YOUR circumstances.

Does anyone out there have any info on load data to get 3300 fps out of a 26" 300WM using 165 or 168 grain bullets without going too far past max load. So far RL-22 is the fastest I have found at 72 grains which is max and gets about 3100fps. Any help would be greatly appreciated.

Jeff Cooper <>
Memphis, Tn Good ole US of A - Tuesday, November 03, 1998 at 23:24:41 (EST) 

Mr. Jeff Cooper, According to Speer #12 manual, It showes a max load of 77 grs. RL22 for 3103fps w\165 grs. bullet. Also showes max 79 grs. RL22 for 3190fps w\168 grs bullet (24
endwrench <>
MT USA - Wednesday, November 04, 1998 at 11:44:15 (EST) 
Once again I screwed up my post! Just can't seem to remember to put my name on there. Anyway, I was just trying to say, work up a load using RL22. Just watch for pressure signs like very flat primers or sticky bolts. Work up from your load of 72 grs 0.5 grs at a time. Speer, Lyman and Nosler all have loads approaching 79 grs RL22. None quite reach 3300fps but most are within 50fps. These were all tested in 24" barrles. The best way to test for pressure is to measure case head expansion with a good micrometer. Any expansion at all is a good place to stop. If RL22 doesn't do it for you, try IMR4350. I noticed several loads approaching what you want. I have had very good luck with it in a .340 Weatherby. I am 2 grains over published max and still have very round primers. Hope this helps.

endwrench <>
MT USA - Wednesday, November 04, 1998 at 17:25:47 (EST) 

Thanks, endwrench, for the help. I screwed up myself, by not rembering correctly what I read in my hornady manual that calls for 79.1 grains for 3200fps with a 165 grn bullet. But I didnt know about the IMR 4350 and may give it a try if I can't work up the load with RL-22. Again thanks for the help and direction.
And thanks to the people who keep up this sight for those of us who need the direction.
Jeff Cooper <>
Memphis, USA - Wednesday, November 04, 1998 at 21:37:44 (EST) 
2) I've ordered a 300 win tactical rifle from McBros that I should see around July or Aug and I'm not familiar with 300 win mag. What is a better bullet for a 25" Hvy Schnieder barrel 1 in 10 twist with a muzzle brake. A 190 sierra or a 200? 3) Any good handloads for either bullet? 4) I,ve ordered the rifle with the new A4 stock, has anyone out there had a chance to work with the proto a s? It sounded good as to the way they enlarged the swell and legnth of the pistol grip and added finger rests like an sr90 and the change to the butt to eliminate the need for a bean bag or using a cross hand braced rest for prone shooting. Just curious. Thanks....
Tony Y
Iselin, NJ, USA - Saturday, February 27, 1999 at 22:19:42 (ZULU) 
Tony Y,

My .300 load is the Hodgdon-listed max charge of H4831 under a Sierra 190 match ball. This cartridge gives good performance at 1,000 + yards. Typical 1,022 yard performance is an eight inch vertical spread with about an 18" horizontal spread in a testy crosswind (or two!) at about 2950 fps(muzzle velocity). This is out of a box stock Sendero with a 26" barrel. I don't know what you intend to do with your .300. I would advise that you do not hunt game animals with the Sierra match ball. Some guys do, but it may be illegal depending on where you hunt. As for other kinds of "hunting" ,well, if you are a realdeal scout/shooter, you're not going to use reloads anyway, so find the best factory load for your weapon, or use what is issued and make the best of it and practice a lot.
USA - Sunday, February 28, 1999 at 05:09:26 (ZULU) 

Tony Y,

I forgot to mention that the group dispersal I referred to is from a 10 shot group at 1,022 yards.
USA - Sunday, February 28, 1999 at 05:14:39 (ZULU) 

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