Oddball accuracy

[yote doctor]

Hello. I had a new barrel put on my Savage 10 (McGowen 6mm Creedmoor). Completed proper break-in/cleaning. Have over 70 rounds through it and I'm at a loss.

Using 41.6 grains of h4350 and 105 VLDs, first two shots are same hole, and third shot is off 3/4"- 1" off. I have shot multiple groups like this. I have been reloading for 17 years and I've never experienced this. Factory barrel shot 1/4 moa and now frustration.

Note. I use my gauge to measure length to the lands. Loading rounds all different lengths including "into" the lands. This rifle is in a McMillan HTG stock and is not bedded. Not sure if non bedding is the issue.... Your thoughts?

Thanks
Brian

 

[Capt RB]

What is your velocity? Do you know your standard deviation or extreme spreads? Have another shooter shoot the load to see if it's there is a loose nut driving it

 

[elkaholic]

Suspious of bedding!

 

[L.Sherm]

Try a different powder, slower burn rate.

 

[shphtr]

I have had the same situation in the past that was cured by bedding the action - certainly worth consideration with the possibility of something to gain and prob nothing to lose except for the cost/time to bed. Good luck.

 

[yote doctor]

Velocity has less than 15 FPS variation. Average of 2,995. Groups all measure .7"-.85" center to center. with shots 1 and two same hole, with third low right. I have removed barreled action and torqued screws to spec. Also checked all scope rings, base, rail screws.

I'll try 4831SC and possibly R19.

I may have a loose nut but ability to shoot a rifle is not one of them. Haha

Thanks guys

 

[L.Sherm]

Give some RL23 a try.

 

[yote doctor]

Without bedding you would think it would shoot just okay. But consistently shooting two on top of each other then one off that far.....? Unless I crumble under pressure when it counts! (100%) of the time!

 

[MagnumManiac]

If all screws check out tight and ok, then I would look at bedding.
You can 'smoke' the action with a candle and check contact points/voids and decide from there whether bedding is necessary.
A barrel that is not stress relieved correctly will 'walk' shots as it warms, bedding and Knox form bedding can help this, as can a pressure point in the forearm of the stock.

I skim bed aluminium bedding blocks just to be safe, it never hurts and always makes the action more stable in the stock.
I find the recoil lug recess on most stocks looser than I like, so I address this first.

Cheers.

 

[Canhunter35]

Bed your action and tighten action screws to spec, or at least bed the recoil lug

 

[Barrelnut]

Try a couple sets of 5 shot groups and see how they start averaging out. All 3 shot groups have 2 in and 1 out, to some degree.

 

[cohunt]

try putting some business cards between the front of the stock and barrel-- I have a rem700 mountain that did this and the fix was 3 business cards thick shim--now it shoots about 1/2moa with no walking

cheap to try, if it doesn't work you only messed up a few business cards

 

[dcederberg]

I have had the same trouble in the past, save yourself the stress and get it bedded. I bet that cures it. Good luck!!

 

[brentc]

Bed it and see if that helps. If not, your load needs further refinement.