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Tikka CTR POI Shift with supressor
I'm getting about 6″ of POI shift with an AAC Cyclone….Anybody else seen this issue? It could be the threading, lack of bedding, etc. but not sure where to start.
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12 Replies
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Adding anything to the end of a barrel changes the harmonics and so changes where the round hits
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That is a pretty extereem shift. The good news is your groups look consistent. I have a suppressor in the pipeline so am interested in this thread. From what I have read there is nearly always some poi shift.
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I read elsewhere that you can check alignment with a 19/64 rod. I may give that a whirl. I still wonder what could have changed. I am thinking about getting a set of shims and tinkering around with the suppressor timing to determine if perhaps that will make a difference.
That was shot at an indoor 100 yard range. The groups outdoors with a proper bench are about 1/2-2/3 that size. Its a remarkable gun despite its quirks.
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Is it dropping 6moa @ 100yrds or elevating….only ask because if its elevation, thats not such a bad thing if you plan on keeping the suppressor on and are into long range shooting. 6″ POI shift sounds like a lot but its not unheard of when adding a suppressor, various designs and brands will all have varying POI shifts.
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Is it dropping 6moa @ 100yrds or elevating….only ask because if its elevation, thats not such a bad thing if you plan on keeping the suppressor on and are into long range shooting. 6″ POI shift sounds like a lot but its not unheard of when adding a suppressor, various designs and brands will all have varying POI shifts.
Dropping.
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Thats a bummer…
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You could try bedding the rifle two inches forward of the receiver. This should deaden some of those harmonics. It won't fix it, but might help a bit.
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Since i´ve been using moderators for all my rifles for a number of years now i can contribute with some info here. Like already said any and all attachments onto the barrel will change its harmonics. A moderator acts like a barrel weight/tuner and so the POI Changes some. The heavier the barrel the less effect but the effect will Always be there, nevertheless.
In most cases a mod actually (a well made one ) makes a rifle shoot tighter Groups since it lessens the felt recoil and the turbulence behind the bullet when it exits the mod is all but eliminated.
A badly made mod OR barrel threading can/will make the bullet clip the baffles on its way out and that will mess with the accuracy – big time.There´s nothing wrong with the OP´s mod. My wild quess is it´s a std/”spaghetti” barreled model so the POI moves downwards quite a lot. Perfectly normal 😉
Several manufacturers in Europe have “lightweight” model mods too. Those will have less “drooping” effect.
http://www.a-tec.no/carbon -
Some companies have muzzle brakes that stay on the rifle so when the can is removed the barrel still has weight on it which decreases the shift. I have a Templar can and it screws right onto the muzzle brake. they also have flash hiders that screw on if you don't want the sounds of the muzzle brake when shooting without the can installed. my 35 whelen has barely any shift with and without the can installed.
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Sir Ville
Those look like some sweet suppressors! Here in the states they have such a sigma, we've only recently had a surge in technological advances. Thank you Obama! Greatest gun salesman ever!
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Tier-one over here in England do a muzzle brake where there mod just screws on over the brake , I've got one on my 6.5 creedmore
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Tier One makes great stuff !! Never had their MB/muffler on though. Like their scope rings and Quad pic rail though 😉
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