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Posted: 12/27/2012 1:22:37 PM EDT
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Quoted: LOL. I know right. That was my Dad. I am all caught up on the tacticool shit for ARs, but not so much for hunting. I use irons on my other hunting rifles. What do you suggest? Weaver base with low rings? Edit: I checked the forend. It is good. I understand. It is just that the comb of the 7400 does not really allow a person to see the sights w/o pushing the cheek into the stock, and the see thru mounts force the shooter into a chin weld, which exacerbates recoil. On a 5.56 carbine, Meh. On a .30-06..... Yes, the 93 mount would work just fine. Weaver also has the same base in steel, under their Grand Slam line. Ensure the gas system in clean. The 7400 is less finicky than the 742, but that is not to say it is not finicky, just that it is less of a "bang, bang, jam" than the 742 was. If you have the money, the Timney Sear and Spring, improves the pull. |
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Take the rear ring tunnel in a set of Channellock Pliers and squash it laterally. This will make it "taller" and tip your scope downward so that it is now "looking" down, toward where the rifle is actually shooting.
Fine tune with your scope's turret adjustments and VIOLA-you're done! Except for the part about replacing the rings with Leupold PRW's on Weaver-type bases... Edited to add: Didn't mean to sound like a smartass, but that is actually the truth. I figure that if your rings are 4" apart, you'd need to add .008" (8/1000 of an inch) in rear ring height to raise POI 6 inches at 50 yards. But that would still leave you with no scope adjustments, so I'd go about .025"-.030" thick with the shim, just to get you centered within the scope's adjustment range a little better. Shim between the rear base and the reciever; don't squash the ring as I "suggested" earlier, unless you don't mind experimenting with the concept. The aluminum they used in those things is pretty brittle; it would probably crack. |
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Quoted:
I picked up the a weaver #93 base and weaver medium height standard rings at Bass Pro yesterday. Everything is mounted and ready for sighting in. Hopefully i can get to the range this weekend. I'll let you know how it goes. Don't Loctite anything just yet, and don't be too disappointed if it still shoots low; you may have a barrel that is slightly misaligned with the receiver. If so, just shim the rear base as described. You can either cut shims from a tin can or buy shim packs from Brownells. Either way, you'll end up with a better, stronger sysyem than the tunnel mounts currently on the rifle. I hope you find the Weaver rings OK. Check them out before opening the wrapper. Look for missing threads, screws with no slot in head, etc. I've seen the newer ones (made in China, I think) with some pretty sad quality-control issues, hence my earlier recommendation for Leupold rings. Weaver's Grand Slam series are probably better than the standard ones. I haven't had any problems with any Weaver bases, though. |
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Quoted: well, i bottomed out the scope elevation again with the new base and rings. I was able to get it grouping around center target at 100 yards, but the group was 6-8 inches. Screw it. I never use this gun and probably wont. The scope will go on another gun, then i will return the 7400 to safe queen status. Thanks for your help. Forend and forend screw issue. Your choice about the safe queen status. |
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No offense, it's your rifle and all.
But the time and effort to shim the rear base, fix the problem and get it shooting very well, would not be much more than the time and effort already expended by others typing out replies trying to help you. You've already invested good money in a very nice scope, rings and bases which tells me that you originally really wanted to get your Father's rifle shooting again, as well as the fact that you took the time to post a thread here asking for help. If the rifle is already shooting small, tight groups; leave the forend and screw alone. Just get the scope pointed where the rifle's shooting by shimming the rear base as I described in the post above your last one. It's not hard to do. Ten minutes with a screwdriver. Do it for you Dad. He'll be proud of you. Edited to add: I'm not trying to diminish RedFalconBill's assesment that the forend and screw may be the reason the barrel is out of alignment to the receiver. He's probably correct, but if it shoots tight groups there, I'd still leave that alone unless you want to throw some gunsmith money at it. That issue is probably out of your league to fix on the kitchen table, but it's your call. My scope shimming fix is easy and virtually free, and I guarantee it WILL work. |
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