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Post by okiecat on Sept 11, 2014 21:35:29 GMT -5
So I take the NF off. Clean the rifle. Check the BP. The vent liner now has 7 shots and has went from .031 to .035. So I found a set of burris zee rings with 20,10,5 inserts. I put a zeiss conquest HD on the gun with 20 in front and 10 in the rear. Indexed to give me 30" of right impact. Also centered reticle. Oh, first shot was with 20 in front only. Bullet hit 14" rt and 5" low at 40 yds. Next shot was with the 20 and 10. Bullet hit 1" rt and 5" low. Im thinking now the action or barrel or both has to be threaded crooked. I just screwed the McGowen on as it came!. Should I take it to gunsmith and have it squared and rethreaded??!! I also took the brake off and left it off.
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Post by bestill on Sept 11, 2014 21:40:34 GMT -5
What did your results show when removed break and swapped rings from earlier thread ?
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Post by Deleted on Sept 11, 2014 21:42:57 GMT -5
I have heard of some misthreading internally from mcgowen but they should have gotten the outside correct. Do you have any gap between where the action threads quit and the barrel tenon ends? If your action was a little shallow or your barrel a little deep maybe you could have an issue there. Very hard to guess where the problem could be if it is deeper than bases, rings, and the scope, let me know if you need further help I would be glad to help anyway I can.
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Post by ping on Sept 12, 2014 7:31:52 GMT -5
I would send it to a qualified gunsmith.
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Post by rambler on Sept 12, 2014 7:33:14 GMT -5
I would send it to a qualified gunsmith. I think myers129 qualifies....IMO |
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Post by linebaugh on Sept 12, 2014 8:05:22 GMT -5
I didn't really want to bad mouth McGowan in public but it may be best for the board. The last gun I put together for a friend the barrel contour was machined out of round and you could visually see it in the breech to contour juncture. My guess would be that it was less than .005 but plainly visible with the naked eye. To better express what I am saying the line where the barrel begins to contour down was approximately .100 out of round. I did not measure this, just a guess.
My thoughts on how this happened. The barrel finish diameter was cut by indexing the barrel on the outside and the contour was cut in a second stage with the barrel cut on centers.
If your threads were cut with the same accuracy and the same time the finish diameter was cut you could easily have problems. A few thousandths off in the first 1.5" of barrel would be significant at the muzzle.
Take that for what it's worth as I am not a machinist, I just own machines.
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Post by Deleted on Sept 12, 2014 9:22:28 GMT -5
I would send it to a qualified gunsmith. A qualified gunsmith would be plenty capable. However finding one that will work on a smokeless muzzleloader he didn't build may be a tall order. Some guys would worry about liability just from touching it. |
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Post by Richard on Sept 12, 2014 16:33:13 GMT -5
Linebaugh
I have done a number of SML's using Remington actions and McGowan barrels and have had no complaints what so ever? The Black Boyd's thumbhole in the "Rifle Builds" section? Its the third rifle I built this year for a customer, then his buddy and that one for the buddy's father. He just called me up yesterday to rave about the 100 yard one
holer and sub moa groups he shot at 300 with it? I guess even the best shops can produce a lemon occasionally? Its the shop that makes good without giving you a ration of S _ _ t that is to be commended.
Richard
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Post by okiecat on Sept 12, 2014 22:01:27 GMT -5
Yes i took the brake off. I shot it last night when i got home just trying to get the scope dialed in with the zee inserts. So two quick shots and Im close, just dont like the fact that something is crooked. There is no gap between barrel tenon and recoil lug or action. Fwiw I put this all together. Now tomorrow Im going to range with loads, tools,and going to try to shoot a group and get sighted in. Yes I have a very good gunsmith that will fix this when I can get time. Thanks for all the help. I hope tomorrow is productive and fun!
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Post by Deleted on Sept 12, 2014 22:06:51 GMT -5
I assume you checked that the barrel is still floating in the barrel channel? Good luck I hope it all works out. If it is crooked at 100 it will get really bad out further. I had a hack job mounting job done on a scope mount for a remington 1100, used all my windage up at 50 yards and it was off by 8" again at 100. It was a pain to fix after the fact.
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Post by lwh723 on Sept 12, 2014 22:20:57 GMT -5
Good luck. I had one 700ML with a Pac-Nor that shot a little low for a Leupold 3-9x40 VX-R. (That scope doesn't have a ton of adjustment in it.) But put a 20MOA base on it, and problem was solved.
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Post by markb317 on Sept 12, 2014 22:59:49 GMT -5
Just like myers129 said if its not shooting straight it will still be off more as you shoot at longer distances. Sighted in at 100yds with the scope moved so it is on target could having it still hitting 6" off to the side of where you are aiming.
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Post by hankinsrfls on Sept 13, 2014 6:51:45 GMT -5
If the rifle shot good, and the scope was optically centered before the brake install then it should shoot good with any scope combination. I would still think the problem is from the brake,,, unless you changed something else.. Sounds like you have change a lot of things so narrowing it down will get a little harder. The Z-rings and inserts might fix the problem, but they are not the answer. Like some others have said.., zero at 100 yards and see where you're hit at 200 yards.. If your mounted at an angle you will be off your aiming point. Just my opinion... Jeff.
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