I have the 260AI in a bench rifle and a hunter. Both have 1 - 8 Twist barrels. As you stated both H-4831 & H-4350 works well with the heavier weight class bullets. My pet and best accuracy load is the Berger 140 gr. VLD Long Range Target on top of 44.5 gr. of H-4350.2900+ with 140s in a 260 is perfect IMO. H4831sc or H4350 are the two best options IMO also. Personally the 139 Lapua Scenar's shot the best in mine. The AI version is the next step in performance within 90 fps of the 6.5-284. Better brass life as well.
46.5 grains of H4831sc for me. 140 Amax was my hunting bullet.I have the 260AI in a bench rifle and a hunter. As you stated both H-4831 & H-4350 works well with the heavier weight class bullets. My pet and best accuracy load is the Berger 140 gr. VLD Long Range Target on top of 44.5 gr. of H-4350.
Did you read what I and rw3 wrote about H-414?? It was very accurate in my rifle but damn it will carbon foul a barrel so bad that it will ruin it. So, beware!!! I will never use it again in anything.....I own five 260s, including the pre 260 Rem, the 6.5x08. Funny how that works, looks the same, uses the same load and the 6.5x08 pre dates the 260, just did not get SAMMI board approval, where Rem rep was chairman.
I will pass the information on that an agent from the hill gave me, years ago. He was shooting a 6.5x08, socially.
You fully prep your brass, fire form, sort by water capacity, neck size.
You seat the 120 SMK .003 off. Use Fed 210m primers, Use a medium load with H-414, increase by 1/2 gr until it shoots one hole, which it will do. Should be around 3,200. That puts the 120 SMK supersonic past 1,200 yards.
You will find it shoots 85 Sierra JHPs with the flat base 1/8" in the case. Runs at around 3,500.
I do a wet bore break in with Sweet Shooter.
Me and a friend of mine tried the Nosler 120 gr. B T and the 100 gr. B T as well and both shot lights out in our 260AIs.My daughters .260 Rem has a 1-8 twist but we've never shot anything but 120's in her rifle and they shoot great with H4350. She started out with Nosler 120gr BT's and they were very good, but they became extinct and we couldn't get our hands on any. Next up was the Sierra 120gr Pro Hunters and they were even better in both accuracy and performance on game and that's what she's been using ever since. When we saw how good they shot and performed i purchased 10 boxes and I'm glad I did because shortly after those seemed to disappear as well. I know several in the area that shoot a 260 and they highly recommend the Hornady 129gr SP Interloc bullet as their bullet of choice in that caliber especially for hunting. Mike
My daughter had a rem model 7 .260 that had a 1-10 twist and it shot the 120's very well with IMR 4320 which we found to be a diamond in the rough in the .260. I've also had equal results in other .260's with 4320, it's a shame they stopped making it.I'm also new to reloading. My .260 has a 1 in 10 barrel twist. Tried some nosler accubond lr 142 gr. Gun doesn't like them. Can any one tell me what I should reload for the 1in10 twist. Shoots 140 gr factory corloks awsome
One of the best things about this site.14 years and 3 months. Has to be a record.