BRNO No.4 barrel tuning screw?

Calfed

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Full Member
Minuteman
Dec 3, 2009
414
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Last year I glommed a BRNO No.4 rifle in great shape. I've been getting it ready for a rimfire match and checked the barrel bedding to see if the barrel was free floating.

6SB8Ojq.jpg


h5QqFjm.jpg


I hadn't noticed before, but the stock is made to cradle the barrel near the end of the stock, so it is definitely not free floating.

hfMPki7.jpg


MPWREIu.jpg


I also noted that there is some kind of screw in the front sling swivel assembly which appears to be some kind of tuning screw, possibly like the tuning screws in the Remington 40X stock.

sfGjdTf.jpg


fswE6ho.jpg




Anyone know anything about that screw and how it is used?
 
Last edited:

Badshot308

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Full Member
Minuteman
Apr 16, 2008
1,034
81
Last year I glommed a BRNO No.4 rifle in great shape. I've been getting it ready for a rimfire match and checked the barrel bedding to see if the barrel was free floating.

6SB8Ojq.jpg


h5QqFjm.jpg


I hadn't noticed before, but the stock is made to cradle the barrel near the end of the stock, so it is definitely not free floating.

hfMPki7.jpg


MPWREIu.jpg


I also noted that there is some kind of screw in the front sling swivel assembly which appears to be some kind of tuning screw, possibly like the tuning screws in the Remington 40X stock.

sfGjdTf.jpg


fswE6ho.jpg




Anyone know anything about that screw and how it is used?
There's a few threads over on RimfireCentral like this https://www.rimfirecentral.com/forums/showthread.php?t=474970 about this rifle. Looks like a trial and error process to adjust the tensioner until you find the sweet spot.
 
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