That just would not shoot a particular bullet well? Picked up a new Sig Cross in 308 with 16” barrel. Since I have a lifetime of Sierra 155 Palma pills that’s what I’ve been trying to feed her. Fully prepped LC brass. CCI BR2 primers. Ladder tested Varget, TAC and 8208. All three showed promise at around 2700fps. Tested numerous 5 shot groups and most have less than 10fps SD. Best groups I can get are just over MOA. Even those aren’t repeatable though. Most are around 2 MOA. Letting barrel cool between strings. I’ve played with seating depth. Scope is tried and trusted NF NXS and mounted properly. No wind to speak of. I’ve been loading 25+ years so I call myself more than capable. Guess I’m gonna try some 175 SMKs. Any advice? Oh. And I let a buddy that shot competitively with me send some. He had the same luck.
Interesting that you post this at the specific time I was thinking about the same topic. I was thinking about others that buy multiple different brands of factory ammo and how accuracy varies so much for them. I've never bought factory ammo, and outside of just a few gun's, I've always been able to find a load that shoots. The variables for me have been the same items you've listed. The few times I have not found a load that shoots well, I've attributed it to a bad barrel - that won's shoot anything well - for very identifiable reasons. For me, if it won't shoot well, it's most likely the equipment, and not the ammo. jmho.
I have a M700 -06 that didn't like 165 Speers or Sierras. Tried a variety of things but a normally sub MOA rifle with everything from 130's to 180's would not shoot 165's into less than 2MOA. Finally tried TSX's and they shoot fine. If I had kept at it maybe the answer would have been found but since there were so many other options I gave up and moved on.
Last edited by Blacktailer; 01/08/23.
I am continually astounded at how quickly people make up their minds on little evidence or none at all. Jack O'Connor
100% agree. Most rifles I hang on to shoot just about anything well with a little load development. It’s a fun little rifle to shoot but it has to step it up or find another home.
1 in 10 should stabilize just fine, both of my 308s are 1 in 12 and they shoot that bullet very well using Varget, H4895 and IMR 4064. Velocities just under 2900 out of a 23.5” barrel. With a 16” barrel I’m not sure if you’re going to get much more velocity. You might move up to 168 or 175 grain but you have all those 155 grain bullets you want to shoot so that’s your call. I load these about .010 off. Head space is around.002. Using Lapua brass, CCI or Fed large rifle primer. I assume you’re using these bullets for target.
Start At The Fhuqking Start,by totally going through all fasteners,especially the foremost one on the rail. Scope sounds suspect too. Hint.............
Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
Start At The Fhuqking Start,by totally going through all fasteners,especially the foremost one on the rail. Scope sounds suspect too. Hint.............
Could be. Easy enough to check. It’s a new rifle so at this point it could be many things.
1 in 10 should stabilize just fine, both of my 308s are 1 in 12 and they shoot that bullet very well using Varget, H4895 and IMR 4064. Velocities just under 2900 out of a 23.5” barrel.
Yep, I've built 300 mags with a 1-12" twist & they're fine................but a 16" barrel shooting 155's a 2700 is 3-350 FPS slower than what's attainable in a 24" barrel, hence the question about needing more velocity or a faster twist at the velocity he's at as a possibility. Hard ot believe Sig would put out something like that though.
He's tried a few things with no joy................or just a schitty barrel. Wouldn't be the 1st time that a barrel has been suspect.
Appreciate the input gentleman. I’ll pull the scope and check the base. Just so happens I have a new Helos BTR I can top it with. It does sound like a scope/mount issue but I don’t THINK it is. Tuesday morning we shall see.
I'd try shooting that load at longer range, say 2-300yds. That short barrel spewing gases around that boat tail could be causing the bullet to yaw, and it may take a while to settle down ,or "go to sleep" as they say. Worth a try perhaps! Cheers, Jack
I'd try shooting that load at longer range, say 2-300yds. That short barrel spewing gases around that boat tail could be causing the bullet to yaw, and it may take a while to settle down ,or "go to sleep" as they say. Worth a try perhaps! Cheers, Jack
Shot the “good ones” at 300. Nothing acceptable or repeatable comes from it. Good conditions and things feel good behind the trigger.
Reality has NO equal and Myths/Wives Tales will do NO "favors". Physics is plum handy. Hint.
Projectile don't/can't/won't leave a barrel and shoot "worse" at 100yds,than they do at a greater distance. "Gassy Boat Tails" are a HILARIOUS notion to boot. Hint.
Keep schit simple,VERIFY correct assembly and mechanical integrity,rather than factoring impossible fhuqking Delusions. Hint...............
Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
I looked at your rifle on the Sig site, you probably want to check the barrel nut, 1 piece receiver/rail so as long as the rings are aligned and torqued properly you should be golden with the Nightforce optic.
