Barrel block torque settings

H

harro

New member
G'day

I am in the process of building a aluminium stock for my .22 rimfire Anschutz bench rifle.
I am experimenting with a few different ideas, and it may end up a complete waste of time, but it is a fun way to spend my spare time.
I am clamping the barrel in a block instead of the usual two bolt bedding system.
My question is how high do I need to torque the block up to hold everything secure, but not to the point of compressing the barrel.
I read here quite awhile ago that there is some thought that clamping anything to a barrel can change the internal size of the bore.I have searched but can't find that thread.
What are peoples thoughts on this subject, and please remember this is a rimfire so recoil forces are not really a problem.
Is there anyone out there using a barrel block setup of any kind that may have some opinions to share???

Thankyou for your time

harro
 
I've barrel blocked a number of CF riles, mostly long range, but at least one point-blank, a .30 BR. It doesn't take much force, depending on the hole in the block. If you make a gauge hole, which requires jacking screws to open it up to put the barrel in, it doesn't take all than many inch-pounds. Depends on the screws, for one thing.

Other thoughts: dissolve some rosin in toluene & paint the block & barrel. That will require even less force. Or, my .30 BR was just had the barrel glued into the block, no screws at all. A glue in is probably the simplest way. Just make sure it's clocked right before curing!
 
harro said:
G'day

I am in the process of building a aluminium stock for my .22 rimfire Anschutz bench rifle.
I am experimenting with a few different ideas, and it may end up a complete waste of time, but it is a fun way to spend my spare time.
I am clamping the barrel in a block instead of the usual two bolt bedding system.
My question is how high do I need to torque the block up to hold everything secure, but not to the point of compressing the barrel.
I read here quite awhile ago that there is some thought that clamping anything to a barrel can change the internal size of the bore.I have searched but can't find that thread.
What are peoples thoughts on this subject, and please remember this is a rimfire so recoil forces are not really a problem.
Is there anyone out there using a barrel block setup of any kind that may have some opinions to share???

Thankyou for your time

harro
Click to expand...

Harro
I use 30"lbs with a 1" barrell and the Block is held on with Eight screwes of 3/16, the 308 bbl needs 50"lbs

Clarence
 
G'day

Thanks for the replies .
I must admit that gluing it in had not accured to me.
I will still continue to go down the clamping track at the moment but gluing has given me a few new ideas.
What got me started on this project is reading about Shelly Davidson"s Tinker Toy.
I have read and looked at that for hours, and and feel that he actually came up with a finnished product ,that included some features that maybe contributed to the sucess of that build ,that even he didn't realise.My stock is not a two piece like his but uses some of the ideas that he created.I am in no way in the same league as him when it comes to inventiveness, I'm just tagging along on what he started.
If, and I really mean if this works, I will report back on my results.

Thankyou for your time.

harro
 
You can use a wooden block and just glue the barrel in with Acraglass. You don't even need the top part of the block just using the bottom half like a cradle will hold it more than secure. They do this for large CF rifles and it works fine. Doesn't look like it would hold but it does and also has the potential to negate vibration caused by direct clamping.

Also there is a fellow that uses a solid aluminum block (you could use wood) with an oversized hole in it for the barrel and just installs regular hardware store O-ring near each end onto the barrel to go between and align them in the blocks then fills in the voids on all 4 sides of contact with epoxy so it's basically a glue-in into a block and there is no metal to metal contact.

Keep us posted on the progress I have been looking for trouble doing a blocked rimfire gun also.

I have dealt with weird vibration issues on rimfire guns and would not want any metal-metal contact if possible but others do fine with it.
 
This may be the reason Anschutz uses a "gasket" between the Alu stock and the 2013 action.
willy
 
Someone that really knows (will remain unnamed) says that they went to aluminum stocks due to the reduced manufacturing costs versus the high cost of the increased labor needed to make fine wood stocks and stated that wood stocks are far more favorable from an accuracy standpoint.

I have friends that had to move manufacturing plants from Germany due to the especially high wages and cost-to-do-business there and he said that the work week is even shorter than the typical American 40-hour week and he couldn't get people to work overtime due to regulations and had to turn business away many times. Trumpka and Hoffa are doing the same thing here and you can't blame the business owners from fleeing repression and seeking automation.
 
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