Jon, you can easliy make one with a boreguide for a bolt gun.I think I have heard of Sinclair products before...do you have a contact name, number? PM me if you wish.
MTM has a goo one with an "o" ring on it that you can shorten to length, then turn down to fit the breach.Cat...shooting .270
SuperCub...I clean from the breech...although I use a brass crown protector when cleaning my 760...




























