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Hunting
Long Range Hunting & Shooting
300 Norma Improved. Load testing, info, and builds
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<blockquote data-quote="rpierce" data-source="post: 1980756" data-attributes="member: 20643"><p>I decided to try some retumbo in my 26" proof carbon barrel with 230 bergers. did a powder charge/ladder test at 580 yds. 4.5 gr spread in powder had 5" vertical. There was a couple nodes. Decided to try the one at 2945 fps. Loaded up 6 rounds and they had 1.4" vertical with a decent amount of mirage when i shot. 5 out of 6 had .9" vertical. The nice thing is even on the powder charge test the shots that weren't in the velocity node still landed in the same spot. retumbo definitely had a tighter vertical spread for that range of powders compared to some of the other powders Ive tested. Went and confirmed my 100 yd zero with a perfectly centered .113" group. </p><p>[ATTACH=full]214353[/ATTACH]</p></blockquote><p></p>
[QUOTE="rpierce, post: 1980756, member: 20643"] I decided to try some retumbo in my 26" proof carbon barrel with 230 bergers. did a powder charge/ladder test at 580 yds. 4.5 gr spread in powder had 5" vertical. There was a couple nodes. Decided to try the one at 2945 fps. Loaded up 6 rounds and they had 1.4" vertical with a decent amount of mirage when i shot. 5 out of 6 had .9" vertical. The nice thing is even on the powder charge test the shots that weren't in the velocity node still landed in the same spot. retumbo definitely had a tighter vertical spread for that range of powders compared to some of the other powders Ive tested. Went and confirmed my 100 yd zero with a perfectly centered .113" group. [ATTACH type="full"]214353[/ATTACH] [/QUOTE]
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300 Norma Improved. Load testing, info, and builds
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