Accurate load falls apart after 100
- Thread starter Grizz1148
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There was an older guy I knew,had a tiki 22-250. His eyes were really bad an we had the scope set for his eyes. I couldn't hit nothing with that gun. He past away a few years ago, his grandson adjusted scope to his eyes, guess what, we both can shoot it well now. Maybe not your problem, but might be worth checking your scope an adjust it.
Grizz1148
Well-Known Member
First thing I checked was the parallax and scope mounts.
Bret GRAVELINE Graveline
Well-Known Member
I didn't read every response so my apologies if I missed something and this has been covered, did you go back to 100 and make you could duplicate your original groups, just in case it's a scope failure, might even try shooting some groups at both ranges with a more traditional bullet, say a Sierra game king of perhaps a ballistic tip, another though that may border on the stupid side, how about cleaning? I have a ruger factory spotter 220 swift, I can fire 3 5 shots groups, each will run about 5/8 inch, the next group will open up to about 2 inches and the next even larger, clean it and it's back to 5/8, I use this on coyotes I've never had a day where I got 15 or more shots at the furry buggers, it's fast at over 3700 with 60 grain noslers so I leave it alone.
Stokesrjsr
Well-Known Member
I've seen this before with my 6.5 STW. After about 1800 rounds it would shoot 1/3 MOA at 100 and 3M0A at 600 where before it would shoot 1/2 MOA at 600. Replaced the barrel and it went back to previous performance.
Not enough spin, the bullet slows down, and just like a gyroscope the bullet starts to wobble.
As someone else above mentioned, load development at 300yds is much more valuable than 100yd groups. Even for zeroing. I will have a muzzle velocity by the time I'm finished with load development and will be very much "zeroed" at 300. I zero my turrets to what my ballistic computer is telling me my 300yd data is using the MV I measured. Could care less what's happening at 100.
Possible copper fouling issue switching between bullets?
How many rounds on the rifle? I have a buddy that cooked a couple 26 Nosler barrels after a couple hundred rounds.
After the groups opened up did you shoot 100 again?
How many rounds on the rifle? I have a buddy that cooked a couple 26 Nosler barrels after a couple hundred rounds.
After the groups opened up did you shoot 100 again?
It's a 1:8 twist. Plenty of spin for those bullets... and I can't see them slowing down enough at 250 for a stabilizing issue when they're going 3200+ at the muzzle.
I know a guy who burnt one up in 200 and one in 400 in a 26. A barrel with that kind of erosion your gonna be constantly chasing your optimal seating depth.
Was talking more on eye piece at beginning of scope.
distantfoe
Well-Known Member
Had a similar situation, tiny groups at 100yds but opened up beyond 300. Es was not an issue.
Gun didn't recoil consistently and groups reflected the inconsistency at distance.
Slapped a cheek piece on that was tall enough, gun recoiled properly and groups shrunk back down.
Gun didn't recoil consistently and groups reflected the inconsistency at distance.
Slapped a cheek piece on that was tall enough, gun recoiled properly and groups shrunk back down.
smokepoler
Well-Known Member
Had a 26 Nosler, barrel was toast after load development, about 300 rounds. Aside that, tiny 100 yard groups aren't always indicative of what the bullet will do at longer ranges, even as close as 300. A suggestion for this cartridge, do your load development at the distance you believe you will be shooting in a hunting situation. Don't concentrate on getting small groups at 100 (you've seen the outcome). You'll save components and barrel wear.
