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-   -   browning 30-06 will not group (https://www.huntingnet.com/forum/guns/420512-browning-30-06-will-not-group.html)

dirty_dan 03-04-2019 08:00 PM

browning 30-06 will not group
 
I have a early 70's browning 30-06 I cant seem to get a good group. It grouped great at the beginning of last year. Around December I dropped it and broke my scope. I bought a new scope and took it to a gunsmith to mount it and to check the gun out. He mounted the scope with new mounts and also took it a part and cleaned it for me. I took it to a indoor range and couldn't get it to group. So i took it back to him and he double checked everything. So again I took it back to the range and still couldn't get it to group. This time I took it to a different gunsmith and they replaced the mounted with a different name brand and used and different scope and still will not group. Any ideas what is the problem. It shot great before I broke the scope. two different scopes, mounts and gunsmith.

Bocajnala 03-04-2019 08:11 PM

Did you change anything else? Different ammo?

It's entirely possible that you had two bad scopes/mounts/smiths... Although unlikely.

Define what kind of groups you're actually getting. Is it all over in an 8" circle at 50 yards or is it at 2" at 100 yards? Is it vertically stringing your shots? Tell us what kind of groups you're seeing and at what distance.

And what kind of groups you had before.

You said you dropped the rifle. I assume the smiths checked the rifle over. But does anything feel loose? Check that the action is mounted firmly into the stock and that nothing is moving around.

-Jake

dirty_dan 03-04-2019 08:45 PM

Before I broke the scope it was shooting a 1" group at 100 yards using a gun sled. now it shots 4' or 5' at 100 yards left and right. No consistency using a 150 grain ammo. Everything seems to be tight and nothing loose.

Bocajnala 03-05-2019 03:27 AM

If it's giving you 4 and 5 FOOT groups, then something has to be loose or broken somewhere.

The scope, bases, action bolts, something isn't right.

If you're positive everything is good you could pull the bolt and look down the barrel with a light to see if it looks straight still. Even a bent barrel probably wouldn't throw shots around like that.

​​​​​​

-Jake

bronko22000 03-05-2019 04:08 AM

The first thing I would do is examine the rifle myself. How did the rifle land when you dropped it? My initial suspect would be a dinged crown. A damaged crown will wreck havoc on accuracy but an easy fix. It could be something with the bedding of the action. Remove the action from the stock then put it back in and snug up the front action screw. Now push down on the rear of the action. If you can feel ''slop" then you need to have it rebedded. (I really doubt this is the issue from one drop).
And bending a barrel is almost impossible from a drop. I had the wind slam a pick up door shut on my 700 barrel and it didn't phase it.

MudderChuck 03-05-2019 04:21 AM

I've had barrels that were almost completely shot out do way better than that. What I mean by shot out is the lands were severely worn, rounded and almost nonexistant.

Best guess would be some sort of severe crown damage that is damaging the bullet on the way out. I have a rifle now with a noticeable crown ding, it still shoots straight at a hundred yards

A borescope may reveal something. Though if it is shooting that bad the damage would likely be visible with a flashlight and eyeball.

Maybe try different ammo,

hardcastonly 03-05-2019 05:41 AM

https://www.midwayusa.com/product/91...hort-long-trac

it may not be related, but check the replaceable recoil buffer pad condition and replace them if damaged, the browning BAR is gas operated,
and use of slower burning powders does cause extra impact wear issues mandating the pads regular replacement ,
group size tends to get noticeably larger if they are damaged, I doubt this is related but certainly for the under $4 or so they cost replacing one won,t hurt.
personally Id suspect the scope mounts need to be replaced,

a steel one piece base
https://www.midwayusa.com/product/10...e-browning-bar
decent rings help
https://www.midwayusa.com/product/14...le-rings-matte


IVE had far more of these style linked below,mounts fail
https://www.midwayusa.com/product/13...ard-scope-base

https://www.midwayusa.com/product/13...standard-rings

RaySendero 03-05-2019 06:04 AM

I had a Browning BAR1 in 30-06.

MudderChuck got my most probable cause that could do what you describe - Crown damage. Yet U say no.
Next would be scope rings or the mounts were damaged - Would think between both GSs they would surely have found this problem.
Try an box of 180 Rem CoreLokts and post target. May want to reduce range and increase target size if really 4 foot groups???

Erno86 03-05-2019 10:01 AM


Originally Posted by dirty_dan (Post 4352922)
Before I broke the scope it was shooting a 1" group at 100 yards using a gun sled. now it shots 4' or 5' at 100 yards left and right. No consistency using a 150 grain ammo. Everything seems to be tight and nothing loose.

"4' or 5' group" at 100 yards or did you mean 4" or 5"?

What brand of ammo are you using?

Let another person try shooting the rifle.

Make sure you have the correct parallax setting on the scope. Try dry-firing the rifle while looking through the scope on the sled.

Lead sleds have been known to be hard on stocks and scopes. I'm wondering if the rifle has an unseen crack in the stock?
You might be putting too much pressure on the forearm of the stock when shooting off the sled. I'm assuming that the barrel is not free floated. Also...you might be putting too much lead weight on the sled, that makes it not slide back some.
I'm also wondering if you picked up a major flinch? If you have...go back to shooting a rimfire or air rifle --- and work that flinch out.

.Make sure you follow through on the trigger press.

I've never shot off of a lead sled. Try shooting another hi-power rifle on the same rest, or shooting off a 12 pound pedestal rest and rear bag with the problem rifle.

Good luck...

Erno

RaySendero 03-05-2019 10:08 AM

I've shot from lead sheds.
Didn't like'em.
Prefer sand bags.


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