Floating action and barrel block bedding?

[lazyeiger]

I have some questions on barrel block bedding.

1/ Any reason not to float the action and barrel block bed a .308 for F T/R?

2/ I assume that when using a barrel block the recoil lug is not used?

3/ How long and how close to the action should the block be?

Thanks! Jon

 

[Charles E]

I have some questions on barrel block bedding.

1/ Any reason not to float the action and barrel block bed a .308 for F T/R?

No, that is the preferred method. I've only heard of one rifle that bedded both the action and block (it didn't shoot too well).

2/ I assume that when using a barrel block the recoil lug is not used?

Yes. The back of the block -- unless it is glued in -- functions as the recoil lug.

3/ How long and how close to the action should the block be?

For short-range benchrest, the front of the block can only be 4 inches in front of the boltface. It is a rule. There is no limit in the other benchrest disciplines. Nor is there conclusive evidence any particular length is better. One notable smith/shooter says "not longer than eight inches." An equally good shooter likes 10+ inch blocks.

The action should not touch the block. .065 clearance is enough.

Consider mounting the scope on the block as well, cantilevered back over the receiver.

I have a .30 BR for short-range BR that uses a 3-inch long block; it shoots quite well. And a 1,000 yard rifle with a 5-inch block. It too shoots quite well.

 

[John Kielly]

Jon,

It's not uncommon here in Australia.

This shot is of Ken Larkin who makes this style of stock shooting F Open. He has a back issue & is permitted under our rules to shoot off a portable bench - it's not austomatic; you have to apply with supporting medical evidence.

John

 

[Boyd Allen]

Charles,
The 4" thing came up a while back, and I believe that it only applies to IBS short range, not NBRSA. 'Turns out, there was a rule change that eliminated the requirement for the NBRSA.
Boyd