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jb weld for bedding

12K views 38 replies 29 participants last post by  Turkey13  
#1 ·
Has anyone tried JB weld or something similar for bedding an action? What did you use for release agent?
 
#13 ·
I used JB Weld once when I was out of Marine-Tex, and couldn't wait. Held my breath, but it turned out fine. I'd use it again if I had to, and not worry.

As for release agent, I thin down Johnsons Paste Wax with mineral spirits, and paint it on with a small brush. I know that way it gets into every little crevice and corner that may be missed by wiping the semi-solid wax on with a rag. A quick buff after it sets to lower any built up spots, and set it in the bedding compound.

Learned that from a gunsmith buddy 20 years ago, and have been doing it ever since. Haven't stuck a single stock.... yet... :cool:
 
#17 ·
jb weld for beddding

I am a user of Devcon Plastic Steel Putty, for bedding; however, the best grouping of any bedding I have done, was with JB Weld, original, with KiWi, natural shoe polish. I bedded the rear of stock, and first 2 inches of z-block, with A-683 for pillar, and 1/4 x 20 take down screw. Resulting with .0XX groups at 25yds, with Leupy 36X, Clark 21 inch barrel, in a Fajen stock.
I always had good results of 1/2 inch groups at 100, with my deer rifles using Accuglass , and reaming out take down screw holes, and filling with the Accuglass to form a pillar, after heavy coating screws with Johnson's Paste Wax, and floating barrels. I know it is not the way; however, it worked for me. The liquid form of Accuglass is messy, but seems to fill all areas of woodwork well. This was back in the day, and now I use the Devcon, but have not repeated the grouping I got with JB Weld. The grouping with deer rifles was with hand loading IMR 3031, in 308, and IMR 4831, in 270.
 
#18 ·
Better results with one epoxy over another has nothing to do with the kind of epoxy. The man who built 3 of my custom varmint rifles, uses a dial indicator to check for any toque left after bedding, and if there is any torque at all when loosening the action screws, he will remove a tad of the bedding, and apply another thin layer, and keep going until its perfect.

As far as the question about bedding for a .22lr. If your out for extreme accuracy, then yes. If your rifle seems to be a little off every few months, yes it should be bedded. Bedding a rifle has nothing to do with its recoil, but how the action sets in the stock to keep it from binding as the screws are tightened, or from moving due to the wood or plastic giving due to humidity or temp. changes. If they are bedded, and bedded right, they will stay sighted in year after year.
 
#20 ·
good old bondo with small amount of house hold insulation fibers. Pam works really well along smooth parts like the barrel/stock forearm plastic wrap and Pam
Why not? Before WW2 gunsmiths used Plastic Wood.

I once had one stick where I'd used paste wax for release agent with fibreglass resin. Two days in the deep freeze and it broke loose. I've also done fibreglass moldings for motorcycle fairings using Vaseline. Never a failure. The pros use some sort of special alcohol-based stuff the sprays on. It's water-soluble, so to separate the parts you just wet 'em down.
 
#28 ·
I used to use Brownells Acraglas Gel with their Aluminum Powder mixed in, but went away from Acraglas as it never felt completely hard to me - you could just mark the surface by pushing a small screwdriver tip into it. The last 2 rifles I did I used Devcon Plastic Steel. It is a bit runny to deal with but mixing Al Powder with it improves it to butter consistency .The next one I do I have a pot of Marine-Tex to try. For a release agent I have used Brownells (the alcohol based one) and one one occasion car wax. I have not used Kiwi but have onle heard good things about it. A mate, who does lots of bedding uses a Ciba Geigy mould release agent. I have yet to end up with a one piece gun but always hold my breath as I separate the action from the wood. :( as always spend lots of time doing prep including temporary dams to contain the compound and masking on exposed barrel where the goo oozes out on to.

For scope bases, should they need it, Devcon.