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#203759 - 11/25/19 12:46 PM Stringing
BushytailBasher
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Registered: 10/26/16
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Loc: Chillicothe, ohio

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Having trouble with stringing from my 357 max contender. Load doesn't vary much in velocity according to chrono. And even if it did I can't see it making this much difference at 80 yards....



Rest off of sand bags on the hood of my jeep. Almost no wind to speak of. Scope and base are tight. I just really can't figure out what is causing it. Forend is on front bag not barrel. Firm hold on gun but not trying to hold it down or fight recoil. All three other barrels I have don't do this. Is it possible that it's just so small and light with the 10 inch octagon that it's being super finicky about my grip and form? And if that is the only logical conclusion I would say it's about useless as a hunting gun seeing as field conditions make absolute perfect repetition impossible..... Just looking for some opinions and hopefully some answers.

.75 inch dots ignore right hand target

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#203760 - 11/25/19 12:48 PM Re: Stringing [Re: BushytailBasher]
BushytailBasher
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Registered: 10/26/16
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The five close to center are 2 different 3 shot groups one of which is the lowest high one.... And none of the ones right next to each other are the same group .... With my 223 barrel at 100 yards I can shoot 3/8" five shot groups with this gun.

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#203761 - 11/25/19 01:25 PM Re: Stringing [Re: BushytailBasher]
Ernie
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Registered: 01/18/04
Posts: 5180
Loc: Gillette, Wyoming

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What is below your grip?
Hand, field bag, hood of your jeep?
_________________________
Ernie the Un-Tactical

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#203762 - 11/25/19 01:34 PM Re: Stringing [Re: Ernie]
BushytailBasher
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Registered: 10/26/16
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Loc: Chillicothe, ohio

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Another bag though it's not rested on heavily.... It's more for my hands to have a solid point to rest than the grip

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#203764 - 11/25/19 03:02 PM Re: Stringing [Re: BushytailBasher]
karl
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Registered: 01/12/15
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Loc: Minnesota

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I'm a bit of an odd ball, but i shoot my best groups if i press down actively on the forarm (same place on bag). A short bipod really works well for me. Grip and forend pressure are critical. Beyoned that, is there any looseness in the hinge pin or the forend? Can you shoot it without the forend for comparison? Any leading in the barrel? Any idea what the junp to the lands is?


Edited by karl (11/25/19 03:04 PM)

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#203772 - 11/25/19 04:08 PM Re: Stringing [Re: karl]
cherokeetracker
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Registered: 11/27/15
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Several things to check but first off I have to ask are you using bags that are hard? Soft bags will move and the gun will move with them. Learned from Benchrest shooters use a good quality bag. (usually Leather) filled full. Protektor is what I use.
Grip yes it can do things, but also check the COAL ! This is important as with different lengths (bullet depth) things will change and keep a good crimp. Do you weigh each load? or use a charge? My Harrel Powder charge is accurate and I am reluctant to trust other brands on certain loads such as rifle cartridges. But my Redding seems to work good too. Check scale also. Eliminate the variables as best as possible and then it will be up to you as the shooter.
Practice does not make perfect,,, But Perfect practice does.

Edit to add,,, Try a different caliber and or gun, with the same setup. Look at the results and see if you are getting good accurate small groups or if you are all over the place. This might tell you if it is you,, or the setup,,,


Edited by cherokeetracker (11/25/19 04:11 PM)

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#203774 - 11/25/19 04:23 PM Re: Stringing [Re: cherokeetracker]
BushytailBasher
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Registered: 10/26/16
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Loc: Chillicothe, ohio

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Nope every charge is weighed everything is done the same as I treat any other cartridge I load for.... I've had this problem before with this barrel..... Every other barrel shoots great off anything I shoot it off of.... Be it a jacket or Cornhole bags or bags of silica gel..... It's only this barrel that I have trouble with.... I didn't shoot with a chrony this time but this load before was only about 35 fps extreme spread.... The loads are all consistent even if I was getting 120 fps extreme spreads it's shouldn't account for stringing a foot high at 80 yards.... As for anything else it's only about 3 inches wide and one of those was a bad shot.... It just seems like this barrel is extremely sensitive to how I grip it but it's not a problem with my 223, 22 hornet or 45/70..... The only difference is they are all 14-16 inch barrels and considerably heavier.... This scope has been on all three of the others also and never had an issue and the scope that used to be on the 357 is on my 223 barrel and it's a tack driver ... I'm going to load some more and maybe put the 2x7 back on it so I can be sure I'm not holding in different spots though I'm sure I'm not that far off..... If this is going to continue to be an issue I'll probably just get rid of the barrel I'd rather have a larger bore anyways.

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#203790 - 11/26/19 12:40 AM Re: Stringing [Re: BushytailBasher]
doc with a glock
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Registered: 06/05/08
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Loc: Montana, USA

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To my knowledge the 10" octagon barrel was not chambered in 357 Max. Was it a 357 Mag rechambered? If yes, who recut the chamber? Some of the old T/C barrels were chambered by T/C using a standard drill press. The chambers were usually reamed off center resulting in barrels that wouldn't shoot for sh_t! A chamber cast will reveal this. The practice only occurred for a short time; however, the barrels chambered in those runs are expensive paper weights.
I had Mike Bellm rechamber 2 new T/C 357 Mag barrels (12" bull) with his specially cut 357 Max reamers. Of the 2, I have only fired 1; however, it shoots lights out with any of my loads. You may want to check out Mike's site at Bellm TCS (http://www.bellmtcs.com/). He is the go-to guy for T/C Contenders and Encores and the 357 Max cartridge in the Contender.

Doc

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#203793 - 11/26/19 07:15 AM Re: Stringing [Re: doc with a glock]
BushytailBasher
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Registered: 10/26/16
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Loc: Chillicothe, ohio

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I cut the chamber.... Never cut a bad chamber before in 40 some guns.... Guarantee its better than the factory chamber was lol Thompson center used revolver reamers to cut the chambers in the 357 mag barrels.... They cut a lot of bad chambers early on but this was done on a lathe all indicated in with a ptg rifle reamer..... I'm thinking the last time I had this problem I took the forend off and it went away but it's been a while since I shot it. I couldn't get it to stabalize the 200 ftx when I messed with it last. It would shoot one hole (couldn't even tell there was more than one shot) at 50 yards and at 100 it could barely keep them in an 8 inch plate... I got frustrated and didn't have the money for another box of bullets in time for gun season so I quite messing with it.... In my digust I apparently forgot. Though it would string even before I cut the chamber bigger with hot loads.... Did fine with a 158 at 1000 though

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#203800 - 11/26/19 01:06 PM Re: Stringing [Re: BushytailBasher]
cherokeetracker
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After reading your other posts I can only suggest two things. One the barrel could be bore scoped, and if you can,, have it checked between centers.
I had a 257 TCU barrel from Thompson and it did something similar.
It would steadily climb up and to the right as I continued to shoot. S&W refused to do anything about it. Barrel was slightly off center, comparing outside to inside dimensions, and there is no way it could be corrected.

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