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Slow powders for .300 winmag

yekimakyekimak Member Posts: 257 ✭✭✭
edited January 2005 in Perry Shooter Competition Shooting and Reloading Forum
Has anyone used really slow powders for the .300? I have not had any loads with h1000 made up, but there are a few other powders on the burn charts that are even slower, and I have noticed that the slower powders tend to perform a little better velocity wise, what else works?
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  • ContacFrontContacFront Member Posts: 1,113 ✭✭✭✭✭
    edited November -1
    I hear a lot of guys are shooting RL-22 with 190s and 200 Sierra Match Kings with great results. I am sure JustC will be by in a bit to give more imput. He is one of the resident long range experts.
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  • will270winwill270win Member Posts: 4,845
    edited November -1
    quote:Originally posted by ContacFront
    I hear a lot of guys are shooting RL-22 with 190s and 200 Sierra Match Kings with great results. I am sure JustC will be by in a bit to give more imput. He is one of the resident long range experts.


    Yup, good stuff!

    "When the pin is pulled, Mr. Grenade is not our friend."
    ~Secret Select Society Of Suave Stylish Smoking Jackets~
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  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    RL22 and the 180's are kinda like the 30-06 and the 165gr and 4350,..it's just a given that you'll find a bad * load. As far as slower powders,..I'd look at N165 as well as the GREAT H1000[8D]. Also, imr7828 and MRP2. If you want to get too radical,..then more neck tension and the heavy pills will be necessary. For a 300win mag and some ground underneath the pills,..I'd go to the 200gr at least and then up to the 210gr-220gr class. The powders I listed excepting the MRP2 are faster, so back up a bit. We got to 74gr of RL22 under a 178gr a-max with NO pressure and sub 1/2moa groups from a sendero. I think she'll take some more powder and tighten up a bit.

    Although a few rounds of barrel life may be sacrificed with slower powders,..I'll still try to get the slowest powder I can to push the best MV I can before it burns dirty or loses speed.

    We have also had some superb luck with the 165gr NBT and RL19 so maybe in the 180gr class you may try some of that.

    why chase the game when the bullet can get em from here?....
    Got Balistics?
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