Matrix 330 changing POI

[nannyhammer]

Question time….. I’ve been practicing with my Matrix 330 to get more familiar before season. Love the bow but still learning the ins, outs of a recurve style. The bow is still set up to factory specs to include the string. Currently shooting 18” Gold Tip Laser II Pro shafts, high helical Blazer vane, aluminum flat nocks and 110grn Brass inserts. All shots taken standing up resting bow on shooting sticks. When I started shooting today the string needed a few more twists as usual, in fact brace height dropped ¼” with the bow setting in my bedroom closet. The last session everything was pretty solid out to 50yds. Today 20/30yds were spot on, but 40yds it was 4” high and about 8” high at 50yds from the last session. Groups were consistent (>3" at 50yds) just not at the previous POI. Checked after shooting and everything is tight to include the scope and speed ring was still set from last session.Can readjusting the brace height change the POI that much?

[xcaliber]

Sounds like the scope might be getting a glitch. Reset it, and see if it holds. Changing the brace height a small amount as you stated will not make that dramatic of a change in POI. Make sure scope mount is not loose by really putting some force to it trying to move it up, and down. If you reset, and then it goes off again, scope is probably bad.

[8ptbuk]

I would suggest switching to Black Eagle Arrows for more consistency . Either Executioners or Zombie Slayers . JMO

[Kegbelly]

I would agree with what excaliber says. If everything was cool last time you shot and this session is a big change in POI, I would check the scope, and everything else while you're at it, including trigger screws. I've never known a change in brace height to make that dramatic of a change in POI. Sounds like you've got something else going on.

[vixenmaster]

CK all ring screws/mounts screws, trigger assembly screws on the inside. Plus the stock screws they all can cause those aim pts the shift

[colouredchameleon]

Check that the scope has not slipped in the rings.
May seem tight to touch but just loose enough to allow it to slip ever so slightly with each shot.
May notice marks on scope near rings.
Recoil on crossbow is much greater than one thinks unlike rifle with straight back recoil. The crossbow recoil is forward and backward therefore not as noticeable but quit dramatic never the less.

Think of it as when an axe or hammer head slips on the handle even when it appears tight . The quick fix results from tapping the butt of the handle on solid surface to shock or slip it back in place. The shock of the recoil can do the same to your scope inside what appears to be tight secure rings

[UPSMAN]

My money is on a loose screw. Maybe a faulty scope. I would shoot from a bench rest just to be sure. Never hurts to be rock solid when you are trouble shooting a problem.

[paulaboutform]

My money is on a loose screw. Maybe a faulty scope. I would shoot from a bench rest just to be sure. Never hurts to be rock solid when you are trouble shooting a problem.

As mentioned, shoot from a bench off a solid rest. Check your scope mount screws, better yet, physically check all the fasteners with a wrench. If that doesn't help I'd suspect the scope not holding zero. Be sure to check your trigger screws as well.

Paul

[nannyhammer]

All, thanks for the inputs so far. I've checked every screw that can be found with zero found loose. The thing shoots great at 20/30yds but shoots high at 40/50yds. No real slop in the left to right it's just the elevation. Groups at 40/50yds are consistent just higher than they should be. Arrows look to be flying clean without any noticeable fishtailing or porpoising. Also the bow was shot several times over the chrono and averages 318-322fps. I currently have the speed ring set at the "5" on the "325" mark. Hope it's not the scope since this will be the second one. Should be able to mess with it more on Friday.

[Normous]

Try turning your variable power (slightly) "UP" above 325 to drop your 40-50 POI.

[strum]

Try turning your variable power (slightly) "UP" above 325 to drop your 40-50 POI.

if you 40-50 yard shots are hitting the same point of impact (even if they are higher than you remember) with each shot then Norm is spot on with this one.
something loose should show up at 20-30 yards also.
youll need to adjust your speed ring to lower your longer shots . this may change you 20 yards POA a small amount so youll have to play with it a little.
Also screws that get over looked the most are the ones holding the trigger unit in. youll have to separate the mainframe from the stock and there you find them (2 ) on the underside of the rail .

[Riflemanz]

Try shooting the same arrow each time when having issues!

[nannyhammer]

Thanks for the additional inputs. I've been shooting two arrows out of the dozen and a couple of times I have shot both of them as tight as 3/4" from each other at 50yds although most times they are hovering around 2". I'll turn up the speed ring next and see if that helps. Thanks!

[Boo]

Thanks for the additional inputs. I've been shooting two arrows out of the dozen and a couple of times I have shot both of them as tight as 3/4" from each other at 50yds although most times they are hovering around 2". I'll turn up the speed ring next and see if that helps. Thanks!

The speed ring is there so you can set your crosshairs and the lower chevrons for different distances/points of impact.
Have you tried getting another person to shoot your bow?

[confederate]

My dead zone is on its way back to Danny Miller for replacement. It was doing the exact same thing. Went out one day and it was way high at 40 yards. I adjusted the speed ring to bring it down. Then the next time out it was hitting about 1.5 inches to the right and high.