briang7511
Member
I am looking for some assistance with a 300 win mag load. So far my rifle (rem 700 sendaro) only prefers lower velocity loads. Accuracy falls off after 2600 - 2700 fps with heavier bullets and 2700 -2800 fps with lighter bullets. I have tried IMR 4064, IMR4350, Reloader 22, and H1000. Best results were with 74gr H1000 and 208amax .030 off the lands. Also tried some .010 off the lands with same results. 3 shot Groups around .900. I have also tried Fed gmm ammo which is around 2900fps with 190gr sierra hpbt and got groups around 2 to 2.5in. HSM ammo which is similar to the GMM groups around 1.5 to 2.
My goal with this rifle was to create an accurate higher velocity load than my 308 to reach 1000 yds, then beyond. I am up to approximately 500 rds through this gun and still searching. When i reach max loads the bolt does get sticky.
My goal with this rifle was to create an accurate higher velocity load than my 308 to reach 1000 yds, then beyond. I am up to approximately 500 rds through this gun and still searching. When i reach max loads the bolt does get sticky.