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Anyone load/shoot a .300 Win. Mag.?
300Win_Mag
Member Posts: 433 ✭✭✭
My Grandfather and I load everything for my Rifle (Model 70 300 Win. Mag.) and I didn't know if anyone else here shot one and what they used.
Currently I am shooting a "varmint" load that consists of Winchester brass, winchester primers, 72.5 grains of IMR4350, and a 125 gr. Sierra Pro-Hunter Spitzer. I don't remember the trimmed case length and overall length but I might not want to give out such top secret information as that. [;)] At two hundred yards you can cover 5 shots with a nickel. This is with the factory issued Simmons 3-9x33. The main function of this load is to rid this world of coyotes.
I have a box of Sierra 168 gr. HPBT MatchKings that I am wanting to develop a load for and shoot long distances with it.
Currently I am shooting a "varmint" load that consists of Winchester brass, winchester primers, 72.5 grains of IMR4350, and a 125 gr. Sierra Pro-Hunter Spitzer. I don't remember the trimmed case length and overall length but I might not want to give out such top secret information as that. [;)] At two hundred yards you can cover 5 shots with a nickel. This is with the factory issued Simmons 3-9x33. The main function of this load is to rid this world of coyotes.
I have a box of Sierra 168 gr. HPBT MatchKings that I am wanting to develop a load for and shoot long distances with it.
Comments
Most 300 Win.s will shoot those well with the same powder you're loading in your varmit load (IMR4350).
Right around 72grs of the IMR4350 usually shoots well in most accurate guns. You may need to start with a little lighter powder charge increase it by .2-.3grs (tenths of a gr.) at a time shooting groups to find what your gun likes. Usually some where between 71 and 73 grs will yield good results with the bullets you have.
I've shot this load for years:
300 Win Mag.
Winchester case(2.61")
Winchester Large Rifle Magnum Primer (WLRM)
Sierra 168gr MatchKing HPBT bullet
72.0 grs IMR4350 Powder for approx. 3100fps w/24" bbl
NOTE -- *Maximum Load = 74.1grs* for approx 3200fps w/24" bbl
This is the accuracy load that has been listed in the Sierra Manuals for years and has always shot well for me too, give or take a little on the powder charge with the components you have.
There are lots of other possible good combinations but this should work with what you have on hand for good results.
Good Luck....................[^]