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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The 25 sst...up and running
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<blockquote data-quote="CA48" data-source="post: 3050074" data-attributes="member: 21446"><p>An update on my original 25sst. Against better judgment at 1320 rounds I decided to have my original barrel rechambered with the new b reamer. Smith set the chamber back .120" and cut the bbl down from 26 to 18". I have 2 more barrels but wanted to see how a rechambered barrel would do. I got it back a few months ago and just now got to shooting it. At first I shot some of the ammo I already had loaded up previously with 58gr of h1000 that was giving me 3170fps out of the 26" and was down to 3130fps by the time I got it rechambered with the 131s. Of course with the new chamber the the bullets were jammed quite bit and shooting 3shot groups around an inch at 2800fps. Went back in seated them 20 thou deeper and shot a .5" group (top of the target). Then went back in and seated them another 30 thou deeper to try and get back to original .020" jump where I used to run them then shot another 3 shot group that went in the .1s (bottom right, the shot just left that is marked was from my 22creed) this was all just now in bright sunlight with a 15mph wind at 3cl. Went back in and seated 6 more like this and shot them they went into about a 1.2" group but the wind was up to 25mph at 3cl by then. So will have to shoot a few 5 shot groups later in better conditions to see how it's going to hold up. Also went and got some of my 67gr hammer loads that we're running 4200fps in the longer barrel and blew up some Michelob ultras that got left out here (I'm an ipa guy)</p><p>131s moving 2800fps right now with a mild load of h1000 so if the gun still shoots well next outing. I may load them at 3000fps with n570 to get the most of the new setup. </p><p>[ATTACH=full]549708[/ATTACH]</p></blockquote><p></p>
[QUOTE="CA48, post: 3050074, member: 21446"] An update on my original 25sst. Against better judgment at 1320 rounds I decided to have my original barrel rechambered with the new b reamer. Smith set the chamber back .120” and cut the bbl down from 26 to 18”. I have 2 more barrels but wanted to see how a rechambered barrel would do. I got it back a few months ago and just now got to shooting it. At first I shot some of the ammo I already had loaded up previously with 58gr of h1000 that was giving me 3170fps out of the 26” and was down to 3130fps by the time I got it rechambered with the 131s. Of course with the new chamber the the bullets were jammed quite bit and shooting 3shot groups around an inch at 2800fps. Went back in seated them 20 thou deeper and shot a .5” group (top of the target). Then went back in and seated them another 30 thou deeper to try and get back to original .020” jump where I used to run them then shot another 3 shot group that went in the .1s (bottom right, the shot just left that is marked was from my 22creed) this was all just now in bright sunlight with a 15mph wind at 3cl. Went back in and seated 6 more like this and shot them they went into about a 1.2” group but the wind was up to 25mph at 3cl by then. So will have to shoot a few 5 shot groups later in better conditions to see how it’s going to hold up. Also went and got some of my 67gr hammer loads that we’re running 4200fps in the longer barrel and blew up some Michelob ultras that got left out here (I’m an ipa guy) 131s moving 2800fps right now with a mild load of h1000 so if the gun still shoots well next outing. I may load them at 3000fps with n570 to get the most of the new setup. [ATTACH=full]549708[/ATTACH] [/QUOTE]
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