300wsm 165GMX Superformance range report.

Discussion in 'Reloading' started by Camshaft, Aug 22, 2011.

  1. Camshaft

    Camshaft Well-Known Member

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    Jun 14, 2010
    Did some shooting this weekend, using 71gr of Hogdons Superformance powder, with 165gr gmx bullets. Pressure was high but not maxed out, I was getting 3/4moa out to 250yrds at 3320fps on average. Decent load but sd was almost 40fps. Gonna play with primers next weekend. Was using rem9-1/2m. Hopefully I can get a lil better. I was honestly impressed with the superformance powder. 3320fps with a 165 leadfree bullet out of a 24" barrel! Was looking all over for some MagPro but settled on superformance, im glad it worked out.
     
  2. baldhunter

    baldhunter Well-Known Member

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    Jun 18, 2008
    That's interesting and Super Performance right there!!!!
     

  3. Camshaft

    Camshaft Well-Known Member

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    Jun 14, 2010
    Well, finished up load development, Backed my load down and settled in at 68.5gr of Superformance for 3225fps average at 2.870COAL with a REM9 1/2m primer giving me an sd of 16fps and groups right at 3/4moa at 100yds. Theses bullets are under 1/2moa in my 700LSS 300RUM but my 300wsm doesn't seem to like them as much, i'm jumping them .200" in my rum but only .060" in my wsm. I would try to jump them farther in my wsm but don't have the case capacity to spare as it has a super short throat. But at $30 for 50 bullets and hunting season 2 weeks away im gonna call it good for now.