New 260 REM AR-10

[260shooter]

Running a DPMS upper and lower, Bartlin 22"bbl, JP handguard, trigger and mount , PRI adjustable gas block, and a brake from here on the Hide. Scope is 3.5-21X50 with GDMR reticool.
Load is 123 Lapua, 45.0 gr H-4350, 7-08 WIN brass necked down and annealed, BR2 primers. Chrono says it's at 2825 fps with 29 fps E/S and S/D of 14.

http://s1238.photobucket.com/user/260shtr/media/100_0212_zps01a9d047.jpg.html

http://s1238.photobucket.com/user/2...t=3&o=3&_suid=1364780602112037489935458461804

300 yard 3-shot group to right of 260 brass.
http://s1238.photobucket.com/user/2...t=3&o=3&_suid=1364780602112037489935458461804
1.5 inches ctc.

 

[yfzjen]

Throw a prs stock on there and you'll love that gun even more.

 

[K_4c]

45 gr of H4350 and no pressure signs out of a gasser!

 

[260shooter]

Primers look good. I know that's not a real good indicator in a gasser. Not tearing up brass. Maybe the adj gas block helps. And it's shooting 123's not 140's.

 

[260shooter]

It's heavy enough without a PRS.

 

[discojon75]

My 6.5 Creedmoor LOVES that H-4350 so it makes sense that a .260 will too. I'm sitting on around 1000 140gr Nosler Custom Comp blems that I got from Shooter's Pro Shop for plinking. Obviously just about everything everywhere is out of stock these days, but it was a smoking deal when I got mine.

 

[260shooter]

Anyone know how to lower extreme spreads in a gas gun? Changing seating depth is very limited do to mag length.

 

[K_4c]

Redding S type bushing dies to start (or the like)....

 

[sch2046]

45 gr of H4350 and no pressure signs out of a gasser!

I was thinking the same thing. I run 43 gr of h4350 in my bolt gun, any more and I get pressure signs. I would be afraid to run 45........

 

[sch2046]

Forgot to say, great looking rifle too. I want to rebarrel my ar10 in 308 to either260 or 6.5 creedmore.

 

[DT1]

I was thinking the same thing. I run 43 gr of h4350 in my bolt gun, any more and I get pressure signs. I would be afraid to run 45........

He's running 123's. 45gr of H4350 should be a good, solid load.

 

[sch2046]

He's running 123's. 45gr of H4350 should be a good, solid load.

I may try that load in my bolt gun and see how it works. I shoot either 139 scenars, 140 berger hybrids or 142 smk. I have never shot a lighter bullet.

 

[LRRPF52]

Hodgdon's .260 Rem load data lists 46.5gr of H4350 as max using the 120gr Speer SP

44.3gr max with the 125gr Nosler Partition

44.5gr max with the 142gr SMK

Different bullets have different start pressures due to construction. 123gr Lapua Scenar on top of 45.0gr of H4350 sounds ok to me based on the data for the 142gr SMK. Watch the chrono for pressure signs first (erratic strings of velocity being a big one).

I max out at 41.5gr of H4350 behind the 130gr Berger VLD, with primers starting to crater. For those with bolt guns, you can beat the 140gr class by running the 130gr VLD at 2850fps without hitting pressures like you would with 142gr or 139gr going fast, as most book value max loads for .260 Rem 24" guns have the 140's at 2700fps.

 

[TexasMade]

How far were you shooting on this Group? Looks good! Did you get your Barlein before the chaos or are they not to bad to get your hands on? looking to build a 6.5 CM

 

[260shooter]

TexasMade I picked up the Bartlin blank from someone here on the hide that wasn't going to finish a build. The group was shot at 300 yards.