Author Topic: 3rd shot wild (Read 508 times)

Lagavulin · « **on:** March 14, 2004, 07:30:24 PM »

After looking at the posts for RugerM77 and the flier shots it was getting, it got me wondering about my Win M70 Supergrade in 300mag that consistantly throws the third round out to 1.5'-2' after a .5' two round group with 200 grain Barnes X. After the barrel cools, it does it again. I dont believe its me as I can get cloverleafs in my 7mag with Barnes X. Now I'm more of a hunter than bench rest shooter and this question may be quite easy for the rest of you but would appreciate any suggestions as to how I could tighten up this group in case I need to shoot a moose more than twice. :-) Incidently, my buddy shot his moose last year in the boiler room with 5, 180 grain Nosler Partitions before it decided to tumble.

stv · « **Reply #1 on:** March 15, 2004, 04:30:09 AM »

The symptom you describe is most likely due to heat build up in the barrel causing the barrel to flex due to a locked in stress. A possible cure is to alter the bedding/ front end support. Try adding additional support to the front of the stock. Often the test is to take a credit card and cut a piece about the size of a postage stamp and clamp it between the barrel and the stock out near the end. If that improves it you may nave to epoxy bed the barrel channel with the barrel pulled away with about 10 or 15 lbs of force. Good luck

gunnut69 · « **Reply #2 on:** March 15, 2004, 07:13:13 AM »

You might try cryo processing. I've seen barrels that settled down after this type of processing.

MGMorden · « **Reply #3 on:** March 15, 2004, 08:18:41 AM »

My Swede M96 Sporter was doing almost the exact same thing last time I was at the range. First 2 shots would be within 0.5" of each other at 100 yards. 3rd shot would land 3-4" from the first two :?. Seems ok for my hunting purposes (I'm only going for whitetail), but it's really messing up my 3 shot numbers. One thing that I thought might be a problem is that the barrel is floated on this stock, and since it wasn't originally designed that way, it might be causing some trouble. I would take blame myself as well, but it did it pretty consistently.

bgjohn · « **Reply #4 on:** March 15, 2004, 08:40:08 AM »

This sounds like the classic Weatherby light barrel syndrome. That's all the accuracy they claim and that's what their test targets show.
JM

Lagavulin · « **Reply #5 on:** March 15, 2004, 09:43:09 AM »

Gunnut69,

What exactly is cryo processing? Never heard of it. This is staring to sound complicated!

jvs · « **Reply #6 on:** March 15, 2004, 10:56:42 PM »

Slip a dollar bill between the barrel and the forearm, it should slide all the way down to the mounting screw, if it doesn't you may need to file some wood out of it. Barrel rubbing in the forearm will usually show up as shiney spots it the forearm.

You could also try to lighten up the trigger to about a 2 1/2 to 3 pound pull. Most people won't admit to flinching in anticipation of a shot but if it's always the 2nd or 3rd round, flinching could be the problem too.