Originally Posted by SAVAGE22-243AI
4831 SC with a magnum primer worked for me. I also had great luck with the 123 A-Max for a 1580 yd Prairie Dog kill in WY last year. I know it just doesn't "BC" out, but the 140 A-Max and 142 SMK just stayed in the air too long and ended up drifting way of target in a 4-5 mph wind at that distance.
At 1000-1200 yds my 140 A-Max and 142 SMK were great.
Using a Savage target action, Walther 28" barrel .260 Rem match chamber 1-8 twist.
In my rifle the 142 SMK, 140 JLK's and 123 A-Max worked out the best.
i built a savage 260 around 4-5 yrs ago old sav action (flat rear), shilen 26" barrel, aluminum full length bed fiberglass stock, custom trigger, 20 moa rail.
my go to gun/favorite. one shot hits, to this day still sub moa to 1000yds. this is what i use to show friends interested in shooting "long range" when they make that first shot hit at say 600yds they look back and say how did I do that? most of them tell me they have never shot past 150yds. Anyway.
H4831sc, 142smk, rem 9 1/2 have been my best loads with es below 10, all my testing consisted of 10 shot groups (2737fps). I still try other combos but h4831sc and rem brass ( i know) rem 9 1/2 primers. I am over 1000rds on this barrel now. H4831sc charge im using is just under 46gr.
Tried light bullets in mine it would lock my bolt so sticking with 142smk.