Accuracy expectations from acraglass bedding?

Dultimatpredator

Well-known member
I'm just wondering if I can can expect better than .5" groups after Acraglassing my action?

I have bedded many rifles on and off over the last 18 years with spectacular results tightening up my accuracy... But the best I've ever got out of all the ones I've bedded have been half inch groups. I bought hs prescion stocks for two of the rifles and both .5" groups with the same loads shrunk to cloverleaves at 100 yards.

The last rifle I bedded was a Ruger 77/44 tuperware stock. I only shoot cast bullets I make through it and the best group before bedding was 2" at a hundred yards. The groups ranged from 2" to 4.4". After bedding and some other tweeking I have a load that shoots .6" and another at .8" with about 8 other plus loads that shoot 1.24"-1.449"...the same loads that were 2plus inches to 4.4".

I glassed a savage 220, tuperware stock 20 guage slugger that was shooting 2.5/2.75" groups at 100 yards. I best group after bedding made one big hole that was around .7" and the other 5 loads I tested shrank to 1.25"-1.75". Both this gun and the 77/44 I didn't use very much glass. I didn't put in a lot just enough to hold the tang in place and a dab on on the rear of the action. The jobs didnt look the greatest but tightened the groups.

I glassed a Remington 600. I did the whole action oozing up and over the stock. The first and only load I tested was some loaded 90 gr NBT reloaded ammo that cloverleaves in my VLS. It shot a .5" group. In all fairness I never tested any other loads out if this rifle.

I also glass bedded my 243 VLS. The best I could get out of it was .5" groups after dozens apon dozens of loads. I put a hs stock on it and the same loads cloverleaf. I have several hs stocked 700 that will cloverleaf that I never skim bedded just screwed them in place with no torque settings.

I also glassed the complete actions of a 1903 in a Boyd's stock and a enfield in a custom wood stock. Both with timney triggers. Once again the best groups were half inch no better.

All the barrels of course free floated and triggers 1 1/4 to 2 lbs max.

It seems like whether I bed the whole action or if I just put enough in to hold the actions in place I can get my glassed rifles to shoot sub MOA but never under .5" groups. The only way I can squeak out a nice little one hole consistent triangle groups is to bolt them into a full length bedded stock.

Any suggestions on how to achieve tighter groups with glad bedding or is this as good as it gets with glass only? I don't want to pillar bed just because I don't have the proper tools and don't want to wreck my stock.

Would pillar bedding along with glassing tighten my groups or stay about the same? I would assume a good glass job is going to hold it in place just as good as pillars would?

 
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Stress free bedding is stress free bedding. The material or techniques all have that goal. Which is simply a non negative to accuracy. Not a primary driver of accuracy potential. All you are doing is removing bedding as a variable.

A crappy barrel will still be crappy. Etc.

- DAA
 
Pillars, properly done remove screw torque as a variable, within reasonable limits.

None of this is possible to attach any numbers to in terms of total system accuracy.

Bedding is very important, it has to be right, but it's not a miracle cure for issues in other parts of the system.

This might help to understand - Why bedding matters.

- DAA
 
You can only get so much from pillar and glass bedding rifles. To get under that .5” it’s gonna be barrel, trigger, shooter, yadda yadda everything. Heck, most people take all that to get under an inch. So I’d say your doing good as is but a quality barrel will really make your accuracy shine. And torquing action screws is proven to help too, those fat wrenches are a good deal. Great for your scope mounting too where it’s even more important!
 
Originally Posted By: Tracker0721And torquing action screws is proven to help too, those fat wrenches are a good deal.

Proven? Can you explain how that's even possible, assuming a good bedding job?

I have always thought that any sensitivity to action screw torque was an obvious symptom of a rifle in need of proper bedding.

I have never seen a rifle with a good pillar bedding job that was at all sensitive to action screw torque. Tight is tight and it doesn't make any difference how tight, without getting stupid about it.

Learn me something here...

- DAA
 
Originally Posted By: DAAOriginally Posted By: Tracker0721And torquing action screws is proven to help too, those fat wrenches are a good deal.

Proven? Can you explain how that's even possible, assuming a good bedding job?

I have always thought that any sensitivity to action screw torque was an obvious symptom of a rifle in need of proper bedding.

I have never seen a rifle with a good pillar bedding job that was at all sensitive to action screw torque. Tight is tight and it doesn't make any difference how tight, without getting stupid about it.

Learn me something here...

- DAA


Yep.
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I'd did order a wheeler torque screw driver yesterday before I started this post...but thought the same. I figured it would help more with equal torquing pressures of scope ring screws so I won't crush my optics. If it's bedded properly it shouldn't matter how hard you do or don't torque to certain degree because it the bedding is done properly it shouldn't stress the action.

I must not have bedded the rifles perfectly that went from half inch groups to cloverleaves with the same loads after installing hs stocks on them then? I remember back in the day if I tightly jammed business cards about an inch or two under my VLS barrel after bedding it would tighten the groups from .5" to .2/.3". I ended up putting glass in the same spot as my business cards and slid the same thickness of business cards under the barrel to let the glass build up and dry to the correct height. After drying it went back to .5" groups. I wasn't going to leave cards in my rifle all the time so I bought a hs stock. The first three shot group at 100 yards with it put all three shots in the same hole at 100 yards. It looked like I missed my target the on the 2nd and 3rd shot. I must have some good barrels on the rifles I put hs stocks in since they will shoot cloverleaves consistently with the correct load. My Remington LTR came with a hs stock. I shot a .196 with it the other day with and it will shoot .2"s with 40 gr NBT and 60 gr vmax if I can do my part. I shot a .3" group at 200 yards the other day with the 40's. First time I tried a 200 yard group with it. The barrel was dirty and hadn't been cleaned in about a decade, the wind was almost 15 mph, and I can tell you I wasn't holding it perfectly still.

What I'm getting at is even with a good glass bedding job there must still be a little flex causing groups to open up. I agree .5" groups is probably all the average person needs for predator hunting but I just like the challenge of trying to squeeze all the accuracy out of every gun I own. I haven't owned a gun I can get to shoot under MOA I'd just like to figure out a way to get them to shoot a little tighter without replacing barrels...if that possible?
 
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