Last week was at the range with a 32-40 CPA and a 12X Fecker.  I couldn't hold a group to save my life.  I quit after trying with 35 BS rounds at 100yds running the elevation setting up and down.  

Yesterday, took the barrel off in preparation of sending the receiver & forearm to Paul for new 38-72 and 40-65 barrels.

The hex head barrel locking screw was better than a 3/4 turn loose before I even started to loosen it.  No wonder the groups were pitiful!  Lesson learned!

The top tang screws are another culprit for backing out due to the tapered cabinet screw used for attaching the butt stock to the action. The fix is to pickup a couple of course tread straight shank screws / no taper with a blunt end and the problem is solved. I have seen Steve Durren make them out of lag screws an easy approach to the problem if one has a lathe. I dug around in the safe and found two straight shanked course thread screws holding the butt plate on a Winchester Model 69 that were a perfect fit so I just swapped them for the CPA tapered screws. In regards to the barrel coming loose I wrap the threads with Teflon plumbers tape and have never had a problem with the barrel coming loose and it also seems to take up any slack in the mating surfaces of the threads. In regards to the hammer screw I have not had an issue but if one does not like to use Loctite you can wrap the threads with some of the wife's sewing thread and that will solve the problem as well and the screw removal at a later date will not be an issue.

J.Louis

I totally agree BP the blue is easy to work with and very user friendly. I lived on a dairy for two years back in 1965 and 66 with an uncle that might have pre-dated Loctite. We had a feed wagon that was used daily and all of the nuts and bolts holding the cross feed angles that moved the feed forward into the beater head and conveyor belt that had to be tightened weekly, of which was quite an extensive ordeal. He had this saying if there is a will there is a way so he got into my aunts sewing box and we wrapped all of the bolt threads with sewing thread and the problem was solved long term. It is one of those tricks I wanted to pass on as it does come in handy for other uses that one might encounter down the road.

J.Louis

I am finding the hammer screw interesting as I have heard the same thing happening to three different people in the same month. Prior to this conversation I have never heard of anyone having the problem. 

J.Louis

John Boy you would also be very well served to epoxy bed the butt stock to the action. The road to the very best in accuracy is one of eliminating variables, each time you eliminate one it can no longer be a part of the problem. Also make sure that your forend does not make contact with the face of the action.

J.Louis

John, every SS in the safe has the forearm shaved the width of a playing card from the receiver. Only rifles I've bedded the stocks are the turn bolts.  Should get in gear with the SS's too.
My 1st BPCR was the H&R Buffalo Classic with the 38-55 barrel too.  Used to hang around the Graybeard H&R and before the 1st range test with the 45-70, did this free floating trick:
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When I went to the range, after getting vernier settings at 100 & 200, had 5 rounds left.  So I went over to the the 600yd range.  Put 153 MOA on the vernier and shot a 2.5 x 7.75" group with 3 holes one could cover with a silver dollar in the 7 ring!  Luck or results from the trick, don't know but the start of my SS BPCR journey!