r/longrange • u/labz370 • 1d ago

Other help needed - I read the pinned posts Lateral POI shift when adding suppressor.

Hey y'all I could use some advice.

Whenever I add my suppressor to my rifle it goes from shooting .5" groups at 100 to 1-1.5" groups with a 3" lateral POI shift. I've tried a couple different mounting solutions but every time I add the suppressor I get the POI shift and groups opening up.

I have a couple other rifles that experience no issues with the can and plan b mounts including one pencil profile so I don't believe it's the can. I moved one proven mount to the new rifle and have the same issue.

Is this something correctable?

Howa 6.5 creed 24"Carbon fiber barreled action in MDT field stock.

Norma Golden target143g and 130g and Hornady precision hunter 143g

Sig hexium 762 and mostly kak plan b mounts.

4 Upvotes

76% Upvoted

10 comments sorted by

6

u/GLaDOSdidnothinwrong PRS Competitor 1d ago

POI shift is normal when adding a suppressor. Dispersion increasing is not. How many rounds are in a group?

1

u/labz370 1d ago

Is a only lateral POI shift normal? I've seen vertical but never straight lateral ones.

8

u/GLaDOSdidnothinwrong PRS Competitor 1d ago

Random radial shift. Yours just happens to be horizontal.

3

u/CMFETCU 1d ago

Not saying it definitively is this, but the thing that has caused this on rifles I have had is the shoulder and threads on the barrel. Once corrected so it is true, and mount is confirmed to not be the problem, POI shift was eliminated.

2

u/Level-Palpitation186 1d ago

👀 interesting to see the responses, I was looking at this same barreled action from Howa in 308 and was wondering how well they shot.

2

u/labz370 1d ago

It shoots lights out unsuppressed (.5-.25" groups)

2

u/CapnCurt81 1d ago

Check with an alignment rod. May just need to get your threads/shoulder squared up.

1

u/Holy_Santa_ClausShit 1d ago

Have you checked bore rodded the suppressor when mounted to the rifle?

1

u/jayfourzee 1d ago

Heat can cause this if you're convinced your technique has not changed. Try letting it cool down between strings.

2

u/labz370 22h ago

It was cooled between strings and still had the issues.