7mag reloading

14 August 2010, 06:36

wyoming boy

7mag reloading

i have a ruger mark II that one day will shot about a 3/4 in. group then the next time i shot it with the same loads will be a 5 in group. can any one help

14 August 2010, 06:53

Bill Mc

There are so many things that cold cause this.

Start by checking your scope mounts and rings.

Change to another proven scope.

Clean the copper out of the barrel, etc.

On your loads, do you crimp. Have the cases been trimmed to the proper length. Are you dropping powder and not weighing each charge.

That's a start.

14 August 2010, 06:58

armadillo

The general rule is check 1st-scope, 2nd-barrel and 3rd-bedding.

14 August 2010, 06:59

Fjold

My Ruger MK II Stainless drove me nuts for years with inconsistent groups, had it pillar and glass bedded, re-crowned, trigger job, etc. nothing helped. My usual routine was to shoot 6-8 three round groups and the loads that showed promise I would load in 5 round groups and on the next range trip they would not shoot consistently. One time I noticed that the groups always got bigger after I cleaned the gun, even with the same loads.

I ran an experiment with not cleaning the barrel between range visits and after about 20-25 rounds it settled in to a solid 3/4"-1" rifle. Right now I have a little over 320 rounds through it since it was last cleaned and it still shoots 3/4"-1" groups.

Frank

"I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money."
- Robert Ruark, Horn of the Hunter, 1953

NRA Life, SAF Life, CRPA Life, DRSS lite

14 August 2010, 15:05

RigbyUser

Confirm what the others have said. Should you be confident that it's not you, then see a good gunsmith about that bedding.

Cheers and best of luck

15 August 2010, 02:56

Doc224/375

Clean barrels can present accuracy problems . DON'T EVER clean a 22 target rifle !!!

It took me over a hindered rounds to settle mine back down ( an at the time I wasn't smart enough to know

what was happening ) So I fed it MATCH AMMO ELY TenX !. Boy talk about STUPID I kept shooting and CLEANING !!!

I almost got a rubber stamp and tattooed my forehead once I realized what I had done wrong !!!!!!!!!!!!!!!!!!!

When I go target shooting or hunting ; A ; I check all action screws scope mounts B ; I sight my Rifle in

shoot my groups of which ever loads I plan on using . C; I DON'T CLEAN until after I'm done hunting or target

shooting and I'm not going to shoot that particular Rifle maybe for a couple of months .

I Never clean my 22's Barrels any more period only chamber and bolts .

17 August 2010, 04:32

wyoming boy

thanks for the tips. i have checked the scope i am running a leapold vxII on this gun. it has been bedded. i had the barrel lapped. and i dont clean the gun. it is starting to drive me crazy because i have a 300 win mag in the same rifle and it will shoot a 3/4 to 1 in. 5 shot group at 100yards. thanks again

17 August 2010, 06:01

ted thorn

quote:
Originally posted by Doc224/375:
Clean barrels can present accuracy problems . DON'T EVER clean a 22 target rifle !!!

It took me over a hindered rounds to settle mine back down ( an at the time I wasn't smart enough to know

what was happening ) So I fed it MATCH AMMO ELY TenX !. Boy talk about STUPID I kept shooting and CLEANING !!!

I almost got a rubber stamp and tattooed my forehead once I realized what I had done wrong !!!!!!!!!!!!!!!!!!!

When I go target shooting or hunting ; A ; I check all action screws scope mounts B ; I sight my Rifle in

shoot my groups of which ever loads I plan on using . C; I DON'T CLEAN until after I'm done hunting or target

shooting and I'm not going to shoot that particular Rifle maybe for a couple of months .

I Never clean my 22's Barrels any more period only chamber and bolts .

Doc, same here on the .22LR I have a Kimber and will never run a rod down her.