Probably a dumb question, but I am game to ask it anyway. My R7 has been shooting great; sighted in at about 20 yards to hit center of targets (cans, paper, etc) repeatedly. I added a Beeman Universal Muzzlebrake last night because (A) the sights were useless with a scope on the gun (B) I read that it would protect the crown.
I only had time to fire off 10 or so shots, but all were off target (low), but they were accurately low, hitting the same location. The expected point of impact is a full inch lower than expected.
So why does a muzzlebreak change the POI? I do not think the scope settings were changed (caps are on). Any ideas?
Re: Weight of the Brake, or A Change in Barrel Harmonics
January 12 2008, 8:18 PM
Fair enough. I am fairly new to this hobby, so things like muzzlebrakes and barrel harmonics are new to me. This brake is fairly light, so I guess I never expected it to affect the accuracy of the gun. Well, point of impact, as I said above, accuracy is fine (in theory), just not where I am aiming!
Am I better off adjusting the scope or trying to fiddle with the muzzlebrake? There may not be a one size fits all answer, but I would rather take some words of wisdom (i.e. experience) from folks here to save me some time (and frustration) in the long run.
It only took me about 5-8 shots and a couple of elevation adjustments to get things centered again. Figured I would reply to (A) say thanks for the help (B) just in case any other newbies out there run across the same problem adding a muzzlebrake.
It's a fact of life that, in reaction to the violent movement of the piston...
January 12 2008, 6:46 PM
...and mainspring prior to the exit of the pellet, the gun moves also, which in turn has a powerful effect on point of impact.
Anything (a-n-y-t-h-i-n-g) that alters this motion - like holding the gun slightly differently, tightening the stock screws, or changing net weight distribution by adding a muzzlebrake - will alter the gun's piston reaction (a.k.a., "recoil") and therefore change the point of impact.
It's inevitable. Most anything you do to a springer will require re-zeroing.
Steve
This message has been edited by pneuguy on Jan 12, 2008 7:04 PM This message has been edited by pneuguy on Jan 12, 2008 6:49 PM
Thanks for the quick response. Before I added the muzzlebrake, I would consistently hit where I aimed regardless of hold (if I can keep things steady). I think the R7 is just damn easy to shoot. At any rate, the muzzlebrake is the only thing that changed.
Hope my misspelling of brake in the title comes across as charming. LOL I am learning and having fun; I suppose that is all that matters to me.
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