vanvock Posted March 17, 2018 Report Share Posted March 17, 2018 I have a Kahr TM1C that shoots way low, I have to use the top notch @ 25yds. I have found other posts with the same situation. Someone suggested that it may have to do with the longer barrel. I haven't altered the sights yet other than bending the rear back a little. I would need to remove so much of the front that I would like to try to help it out a bit in some other way if possible to reduce that amount so I don't have to re-contour it. Has anyone tried making a shim to go under the rear sight? I'm also wondering if a shim between the fore grip mount & the barrel to give a little upward pressure would help? Has anyone tried this, if so how did it work out? Link to comment Share on other sites More sharing options...
95mustang Posted March 17, 2018 Report Share Posted March 17, 2018 How low does it shoot at 25 yds ? I would first check if barrel is square to receiver. Could have bad threads in receiver not concentric to Receiver.Lay a straight edge like a metal ruler down on top of receiver and then give it the ol hairy eyeball look and see if the barrel is aligned with receiver Link to comment Share on other sites More sharing options...
vanvock Posted March 17, 2018 Author Report Share Posted March 17, 2018 Thanks, I'll give that a look Link to comment Share on other sites More sharing options...
95mustang Posted March 17, 2018 Report Share Posted March 17, 2018 (edited) Look for a gap under the straight edge right in the vicinity of the mag slot/ejection port area.A warped receiver is going to show the barrel pointing up which will have the same effect on bulletAs too tall of front sightmine shoots to point of aim pretty reliably but you can fit a pc of paper under the straight edge right where the ejection port isand its a steel receiver i highly suspect that this is where the problem lies.especially with an aluminum receiver . the cure will be to shim under the rear sight as you mentioned or......................... get another receiver , preferably steel Edited March 17, 2018 by 95mustang Link to comment Share on other sites More sharing options...
troll Posted March 17, 2018 Report Share Posted March 17, 2018 I have the same problem - 50yd zero with the lyman ladder set for 250...... Front sight is now filed down to a nub to fix it. (M1927 deluxe) Link to comment Share on other sites More sharing options...
vanvock Posted March 17, 2018 Author Report Share Posted March 17, 2018 I don't remember exactly how low, about 12 - 16". Windage is fine. Checking the first section of barrel where it's not tapered shows a drop of .026". The receiver does show a slight gap where you say, enough to see light but not enough to slide paper in, it touches @ the front @ the barrel then again in the area above the grip & another slight gap ahead of the rear sight. What do you think about a pressure shim under the barrel? Link to comment Share on other sites More sharing options...
Enforcer Posted March 22, 2018 Report Share Posted March 22, 2018 I had the exact same problem with my TM1, until I SBRed it. The problem is the longer barrel, no question about that. I think your only choices are to use as is ( which is what I did) or have one fabricated by a gunsmith / machinist with the peep near the top where the current notch is. Another option is to have the earlier "L" type fabricated with the peep near the top and this might be less expensive. Link to comment Share on other sites More sharing options...
vanvock Posted March 22, 2018 Author Report Share Posted March 22, 2018 (edited) Thanks for the input. I filled in the "peep" hole which is more like a picture window & drilled a 5/64 hole @ the very top of it. That got it to 7" low. I have made a 1/4" spacer to go under the sight which should get it close. I haven't mounted it yet, having a little trouble finding 8x36 screws. Edited June 2, 2018 by vanvock Link to comment Share on other sites More sharing options...
Adg105200 Posted March 22, 2018 Report Share Posted March 22, 2018 If you use eBay, there are plenty of 8-36 screws there that should work with the spacer. Andrew Link to comment Share on other sites More sharing options...
vanvock Posted March 22, 2018 Author Report Share Posted March 22, 2018 I've looked there but they are in bulk. It may come to that but I'll try a few more spots locally first. Link to comment Share on other sites More sharing options...
shadycon Posted March 22, 2018 Report Share Posted March 22, 2018 Have you tried 'Midway' or 'Brownell's'? Link to comment Share on other sites More sharing options...
vanvock Posted March 22, 2018 Author Report Share Posted March 22, 2018 Yes, I did but had no luck searching their sites. My comp. doesn't play well with Midway's site because I don't run Java ( & will not & they don't seem to get it or care). I found some at a gunsmith, machinist, who works on & makes parts for M2's & 3's but they are an inch long with a different type head which is ok. I need about 1/2". I'm trying to avoid having to cut them off since the gun is still under warranty & don't want to bugger the threads & give them an out. I don't have anything to chase them with. Link to comment Share on other sites More sharing options...
95mustang Posted March 22, 2018 Report Share Posted March 22, 2018 Mcmaster carr has 8-36 flathead screws 1/2 inch long packs of 25 for like 10 bucks or so Link to comment Share on other sites More sharing options...
95mustang Posted March 22, 2018 Report Share Posted March 22, 2018 91253A220 is the part number Link to comment Share on other sites More sharing options...
vanvock Posted March 23, 2018 Author Report Share Posted March 23, 2018 Thanks Link to comment Share on other sites More sharing options...
TSMGguy Posted March 24, 2018 Report Share Posted March 24, 2018 You'll be amazed at how little metal you have to remove from the top of the front sight to effect vertical zero in a really big way. You might look at your target and think that you'd have to file too much off of the front sight to correct, but this is not true. Corrections done at the front sight always have far greater effect than those done at the rear, for both elevation and windage. Shoot single check rounds from a rest while you're filing, and groups as you get closer to zero, and to check zero. Do a neat job with a draw file and touch up the metal with cold blue when finished. Things will look very neat indeed if done right. Link to comment Share on other sites More sharing options...
vanvock Posted March 24, 2018 Author Report Share Posted March 24, 2018 Thanks, I've been thinking it would be the same effect at either end. I found a formula to get the amount to remove from the front which at this point would be : site radius 27.25 x .0012 for 25yds (.0006 for 50yds or .0003 for 100yds) = .0327 x 7 (in low) = .2289 the amount to be removed from the front site. I don't mind doing it that way but for now I don't want to alter the gun. Does that sound about right? Almost a quarter inch wouldn't leave a lot of blade so it might need some re-contouring. Link to comment Share on other sites More sharing options...
TSMGguy Posted March 24, 2018 Report Share Posted March 24, 2018 1/4 inch would be way too much. Trust me, here. Just head for the range with 50 rounds, a rest, and a draw file. A 7" correction will not disfigure your front sight. I know the procedure sounds crude, but it's actually very precise. When you're at the range, make a mark that you can easily see on the target, 7" (I think you mentioned) below the center and a bit to one side. Now rest the gun and center the sights on the bull. Note where on the front sight your mark falls. That's how much metal you'll be removing. It won't be 1/4 inch. You can make your decision from there. Link to comment Share on other sites More sharing options...
vanvock Posted March 24, 2018 Author Report Share Posted March 24, 2018 Thanks again. I'll give it try. Link to comment Share on other sites More sharing options...
vanvock Posted May 23, 2018 Author Report Share Posted May 23, 2018 This gun is currently back @ Kahr for the second time for the low shooting as well as jams. I'm wondering how much the barrel being not square would effect the feeding & firing. Could it be a contributing factor in the deep strikes & blown out primers? Maybe the feeding jams & failure to go completely into battery as well? Link to comment Share on other sites More sharing options...
vanvock Posted June 2, 2018 Author Report Share Posted June 2, 2018 UPDATE to the ongoing saga of my Kahr. Got it back wed. & test fired 100 rnds today. Based on the parts swap list & actions taken on the return sheet I was skeptical. Said they adjusted the feed lips (which they said the first time) but all 3 still had sloppy fit as before. They also said accuracy tested ok, target included which was not. I had 2 boxes of 2 brands ammo, loaded mag 1 up with 20 & it jammed on the 6th rnd. off the left side, cocked like it got away from the bolt & it got on top of the rnd. I thought "here we go again" pulled back on the bolt, let it drop in the chamber & let it rip. That was the only hiccup. For the first time I actually had fun with my fun gun. Even did some rapid fire. It still shoots 7" low but I can take care of most of that by filling in the peep hole & drilling a 5/64th peep at the top as before (I un-did it before sending it back). All shots fired holding the fore-grip, not the mag & all 3 mag's worked fine. Checked mag 1 again with no prob. Of the 97 cases recovered all primer strikes were normal, even the ejection pattern was more consistent. Hot damn! They did some polishing at the bottom of the feed ramp, replaced pawl spring sear block & trigger assy. There is indication that the front sight pin was taken out (didn't bother to touch it up- or clean it) so I'm thinking maybe they turned in on it some or replaced it or the receiver, there's also some shiny where the barrel meets the receiver that I don't recall seeing before & the top of the receiver looks flatter to the straight edge than before, no gap above the eject port as mentioned by 95mustang. So, to all my fellow new Kahr owners, there is hope. To quote the old Indian fellow in The Outlaw Jose Wales movie, you must "endeavor to perceiver". Thanks to everyone here for your responses, you've been a great help. Mike Link to comment Share on other sites More sharing options...
Devious6 Posted June 2, 2018 Report Share Posted June 2, 2018 Great news!! So glad that you can enjoy shooting it now!!! Post some pictures when you can!! Link to comment Share on other sites More sharing options...
95mustang Posted June 2, 2018 Report Share Posted June 2, 2018 (edited) They are incredibly fun plinkers .Chasing dura seal targets around the pit.And when they run you can't wipe the grin off. Edited June 2, 2018 by 95mustang Link to comment Share on other sites More sharing options...
vanvock Posted June 3, 2018 Author Report Share Posted June 3, 2018 Fired another 50 today with no malfunction. 47 recovered with 1 blackened deep primer hit. Re did the peep hole mod & some front blade filing & it now shoots POA, even got a couple 2 hole 3 shot groups. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now