I just bought an old single shot rifle in 218 Bee and need to be able to put a Harris Bipod on without drilling another hole. It presently has the inserts for a push button type sling swivel it appears. I looked in the Brownell's catalog but did not see an adapter to go from that type of insert to the Harris which attaches to a quick detachable swivel stud. Anybody overcome this problem yet? Thanks for any solutions. Tom