Very useful advice from all.
Perhaps i can also give some input from my experience in successfully getting the bolt attachment point to hold permanently even with stronger springs. I currently swap between 14kg - 18kg custom aftermarket springs for my brass breeched longshots.
I use specific customised foam darts which fit perfectly in 9/16" brass barrels, so i also had to find a lasting solution to the bolt attachment issue.
I tried every glue avaliable at my local hardware stores... super glues, fishing glues, various 2 part epoxy glues etc. Even with the larger bolt attachment surface area, all of the tested glues still could not provide a solid attachment for more than a dozen shots.
Until i tested the Selleys Araldite Super Strength 2-part epoxy glue. It is an epoxy glue that requires 72 hours (yes, 3 full days) to cure for maximum bond strength.
Here is a product link for reference: http://www.selleys.c...th/default.aspx
In addition, i also use a customised polycarbonate shotgun grip which helps balance the load stress to prevent the twisting flex that tends to occur during one-sided charging handle priming.
So far, after many games and extensive test fires over the past few months, the bolt attachment piece is still holding strong without any signs of weakness or breakage. So it looks like the Selleys Super Strength Epoxy Glue was an ideal adhesive for this application, matched with the larger bolt attachment surface area and perhaps the customised shotgun grip.
Maybe you can try out that epoxy glue brand if you can find it at your local hardware stores, see if it works well for you.
Edited by SgNerf, 30 May 2010 - 11:43 AM.