Recoil Lug on BAT B action, whats is the preferred method?

[SG4247]

I have a new BAT "B" action that has the "XP" cut in the underside of the receiver body.

How is this machined feature supposed to act as recoil lug? I really do not see this as being functional to mange rear thrust from the action.

Shooting 6.5 x 47 Lapua with 140-142 grain bullets, no muzzle brake or suppressor, so there will be some recoil.

Planning to use a PRT lowboy stock.

Any thoughts or comments would be appreciated.

 

[tmwinds]

Don't worry. Properly bedded, the XP cut works just fine. The tang also acts as a recoil lug. I have several BAT actions with the XP cut and I've never has a problem.

 

[dkhunt14]

The back edge of the tang has a lot of area and acts like a recoil lug if properly bedded. I have an M and shoot 1000 yard BR and have no issue using a 300 WSM and 210 Bergers. That is a lot of recoil and no issues. The gun has shot rather well and set a record or two and won a few aggregates. Matt

 

[Alex Wheeler]

My opinion is a recoil lug should always be at the front of the action. Recoil forces cause the barreled action to try and rotate on the lug. If the lug is up front it forces the action down into the bedding. If the lug is in the rear it pulls the action away from the bedding. Now in actual use there may be not be a real difference. If I had to use an xp I sure would want the front of that cut to be 90 degrees to the action center line, not an angled cut.

 

[SG4247]

So what does properly bedded mean?

Should the bedding in the stock, very closely fit the "XP" cut in the receiver, like setting the "XP" cut feature it into semi cured epoxy?

Then the rear tang should also closely butt up to the stock? (but still has clearance for the trigger block).

I guess a picture or illustration would really help...

To me, the forces involved during firing would want to lift the receiver and barrel out of the stock with this method.

In my head, the action would pivot at the rear tang, creating separation from the XP cut and the bedding, causing tension on the action screws.

Thanks for the feedback, just really struggling with picturing in my head - how this is intended to work.

 

[dkhunt14]

My actions are sitting on 2 pillars and bedded with about 120 thousandths of steel bed under and behind the tang. I am pretty sure it could be shot without the screws in holding it down. You have to tap and jiggle to get the action out after the screws are removed. Matt

 

[SG4247]

My actions are sitting on 2 pillars and bedded with about 120 thousandths of steel bed under and behind the tang. I am pretty sure it could be shot without the screws in holding it down. You have to tap and jiggle to get the action out after the screws are removed. Matt

Matt,

I would really appreciate pictures of your stock bedding work, next time you have the thing apart.

My email is sg4247@yahoo.com

Appreciate all the responses guys.

 

[dkhunt14]

BAT does not recommend adding a recoil lug to any of their actions. The larger actions like the MB and M have a bolt on recoil lug that handle larger cases while the square tang and cutout handle the smaller cases such as the 47 lapua. Call or email BAT if you have any questions. Just be patient as they don't answer the phone during the workday.

My model M multi flat has the notch and no bolt on recoil lug. I have shot it with 300 Weatherby IMP and 300 WSM with no problems. It is just a typical bed job with pillars by Mark King. The pillars are bolted to the action and have extra room around them for the epoxy. When it is together the pillars and bedding are all one. When the screws are tight the action is bolted to the pillars. If you go to the main page and type in bedding in the red search area. Up will come an article about stress free pillar bedding by Richard Franklin. In that article there are pictures what my bedding looks like. Except we make our own pillars and they are a little larger in diameter.

 

[Dusty Stevens]

If it doesnt have a recoil lug on it whether it be sandwiched inbetween the barrel/action or bolted on it should be glued in. Thats the intention of a small br action like a b or s.

 

[mr45man]

[SIZE=medium]Bat 3 lug, No glue, 300 wsm Shoots light out at 1000.[/SIZE]

 

[SG4247]

Mr45,

Thanks for the pic. That is a really nice example of what I am needing to see.

Is that 3 lug receiver round, MF or Octogon?

Again thank you for the post of your stock bedding.

 

[mr45man]

Its the round one. I have it apart installing a rail .
John H.