barrel lockup ?

[rc51kid]

Does the fit of the front forearm have any effect on the lock up of the barrel? On some barrel/ forearm combinations that I have it is really hard to get the forearm off of the gun.   I was thinking of just lightly sanding it around the screw hole to take some of the pressure off of it.  But I didn’t know if it needed to be this tight for the lockup.

[cheatermk3]

Hi

I'm no expert, but a forearm that has the hole for the screw drilled a bit off-center foreward (like yours is, if I'm reading your post correctly) keeps the system in tension when it's locked up.  This should help improve accuracy.  So, I guess the short answer is, yes.

How is it shooting?  If it shoots good I personally would not change it.

If you do remove some material from the screw hole area, and the result is a negative impact on the accuracy, you can always shim it back out.

[Fred M]

Does the fit of the front forearm have any effect on the lock up of the barrel?

Yes it does. A tight fore arm will pull the barrel away from the hinge pin and the standing breech.

But a tight forearm is needed for good barrel dampening.

If you a have a tight standing breech with no gap and a tight forearm you are in good shape. I set up my Handi's with no gap and the barrel will not fall away when you push the release buton. Every thing is snug.

[rc51kid]

thanks guys.  i will have to look closer at the gap to see how it fits.  The main problem is that i put my huntsman barrel on the topper i bought the forearms is so tighr to get off i am afraid i will break it.  i can still pull it off with my hands but it is tight.  Also how do i tell if my huntsman barrel is locking up right on that frame?

[Fred M]

You should be able to lock up the barrel without the forarm. There should only be a little play up and down on the latch button and the barrel should the be locked up without a gap in the between the end of the barrel and the breech.  

When the barrel is locked up and the forearm is too tight you need to relief the stud hole on the forearm.

I dont know a Hunts man from a topper tell me if they are shot guns or rifles or both. Are you having shotgun frames or rifle frames SB1 or SB2?

[rc51kid]

I might have done a poor job describing it or used the wrong names.   I bought a used 270 sb2 a  while back that also had a .50 cal muzzle loader barrel.  The 270 had a stock with a high comb on it so it was hard to use the sights on the .50.  So I recently found a 12g slug gun for sale and grabbed it for $50.  On the H&R page it looks like H&R will put the .50 muzzle loader barrel on the SB1 frame, so I figured it would be OK to use it on the shotgun frame.  The .50 barrel locks up tightly on the shotgun frame with out the forearm.  It has no play and actually needs a pretty good “snap” shutting it to make it lock.  But once it is locked it wont open without first pushing the release button.  It doesn’t make the same audible “click” like my other barrels/frames do.  But it still appears to lock.  The forearm is also really tight to get off.  This was what my original question was about.  But I guess I should have been asking about the lock up also.