Re: load workup for 300 RUM...
Here are the loads I've tested so far (last 2 weeks) and some rough notes on each. I'm shooting a Remington Sendero SF II , scoped w/ a Huskemaw 5-20LR.
Nosler Accubond, 200g loads:
93g Retumbo, 3.61 OAL, CCI250 : 3045FPS avg, poor accuracy (2.3" @ 100)
89.5g RL25, 3.61 OAL, CCI250 : 2995FPS avg, poor accuracy (2" @ 100)
91g RL25, 3.61 OAL, Rem 9 1/2M : 3050FPS avg, OK accuracy (1.75" @ 100)
92g RL25, 3.61 OAL, Rem 9 1/2M : 3075FPS avg, OK accuracy (1.5" @ 100)
95g Magnum, 3.61 OAL, Rem 9 1/2M : 3055FPS avg, OK accuracy (1.6" @ 100)
97g Magnum, 3.61 OAL, Rem 9 1/2M : 3075FPS avg, OK accuracy (1.5" @ 100)
98g Magnum, 3.61 OAL, Rem 9 1/2M : 3204FPS avg, Good accuracy (1.1" @ 100)
Barnes Tipped TSX (LRX), 200g loads:
87g Retumbo, 3.62 OAL, CCI250 : 2890FPS avg, Good accuracy (1.1" @ 100) <- this was a 5 shot group with 1 flyer...4 of 'em were sub-MOA
85g RL25, 3.62 OAL, CCI 250 : 2910FPS avg, Good accuracy (1.2" @ 100)
I've got some more loads built, just need time to go shoot/record them. I'm slowly dialing in the accuracy and bringing up the velocity. That load with 98g of Magnum was moving pretty fast, but there weren't any pressure warning signs.....
I'll keep reporting back (if you want) with the additional loads I've got worked up. I've got 5 more loads put together with the 200g TTSX that I need to get out and shoot. My Sendero seems to like that bullet.