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Variations in loading for the 260 Reminton.
Old 02-07-2005, 05:42 PM
Dave Scott
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Thumbs up Variations in loading for the 260 Reminton.

I note that several of you folks who load for this round report large variations in velocity. I have a Rem Model & with the 18in bbl. I already was using IMR 4831 so I pleased to find that it's one of the two best powders for the 120 gr. bullet as far as velocity is concerned. When I first bought the rifle I inquired of Reminton as to how much velocity loss I could expect from my 18in. bbl as compared to the 24in test bbls that all the loading info was based on. They replied that I could expect to lose 30fps. I was very confident therefore that I could obtain a minimum of 2950fps using 46 1/2 grs (almost compressed load) of IMR 4831 with a 120gr reminton PSP with new Rem. brass and Rem 9 1/2 primers. Off I went to the range, Chrony in handbut to my dissapointment I was only able to achieve 2554 fps ave. I asked reminton why but they ducked their heads ! I then read an article on the effect of temperature on cartridges. The day I went to the range, it was about 35 F with a cold wind. On my second trip the temp was about 55f and I averaged 2664fps ! that's 110 fps ! I live in central Canada and by the time rifle season rolls around the temp can be anywhere from plus 10 to minus 25F
I shot a 6point White tail this year at 80 paced yards using a frontal neck shot. The temp was -5F but it stopped him dead in his tracks so the rifle, lower velocity or not did the job. I still admit however to wanting a max. velocity with best accuracy for my handloads so I plan to try the new Barnes Triple Shock X bullet. They advertise greater velocity at lower pressue and in their email return they say I can load 1 to 2grs. higher than listed ! As standard length 4831 is all but compressed at 46 1/2 grains, i may consider another powder taht would give me some extra oomph in the same case. The problem in the Model 7 is magazine length. I'm almost required to stay at the factory O.A.L. to work the rounds through the action. Anybody out there with a model 7. pre 2000 with the 18bbl that has any ideas. I'd be very happy at 2700 to 2750 fps vel with the 120gr at 70F
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