I went to the range to work up some loads for my 300um. rem lss, factory 26 barrel w/ muzzle break approx 80 rounds to date. using 200 gr accubonds with retumbo.
averaged from 3 shot groups
82 grains 2650
82.5 2698
83 2759
83.5 2833
84 2939
84.5 2763
85 2951
85.5 2823
86 2844
as you can see it kind of fell on its face and I dont know why. all rounds were loaded individually on a digital scale, I rechecked by loading some at 85 grains and went back to chrony, they avr 2750.
Im lost, is the bullet exiting before the powder is burned up? I could use some suggestions
Fred
I had similar inconsistency when using my digital scale. I pulled all rounds that I had loaded and went back to my balance scale...problem solved. How much does one have to spend to get a good digital? The accuracy of 0.1 gr that they claim is bullsh*t.
AZ, looks like to me you ain't stuffin enough powder in her. Pour the meat to her about 94gr. and watch her smile at 3100fps. Another tack driving load is 91.5 of RL-25, It was giving me 3263,3267,3261 on that perticular day and temperature. It did in fact shoot a 1 hole group at 300 yds. but be warned, this powder is very very very temp sensitive in this caliber. At least it is at 165 feet above sea level.
Check out page20. There is some pics of a gong I beat the snot out of with 210bergers and Richard's 210 wildcats. I was shooting 94gr. of Retumbo going 3100fps. Only thing I do not like about Retumbo if you try and strech it past that you will see the velocity start to go down the primer pockets seem to open up. I liked 91.5gr. of H-1000. It was not all that fast 3025's but it was consistant and the temp didn't seem to bother it. If you really want to smoke one out there shoot 97gr. of H-1000 behind a Berger 185vld at 3400fps. It will roll a 125lb. hog at 500+ yards no problem.
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the max load in the book for retumbo is 86 for a 200 gr bullet, just to clairify you are saying go to 94?
[/ QUOTE ] i have seen max in books from 86gr to 92gr of retumbo behind a 200gr bullet i can shoot about 95gr before the primer pockets start opening up but i get the best accuracy about 93 grs with the AB's out of a 31" 5c broughton runs right at 3220 fps for me
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