I've had my Buckmark Camper for a couple of months...maybe put 1000 rounds through it.
I tried the bulk pack stuff - Remington, Federal - with mixed results. Thunderbolts the same.
Tried the MiniMags from CCI, and....EUREKA....a marriage made in heaven. They're accurate, consistent, feel good in the gun.
I'm paying $3.00/100.
Keep those slide bolts tight...mine would loosen up every 50 rounds or so. I cured the problem with blue Locktite.
Here's a site for an inexpensive scope mount adaptor:
http://www.jackweigand.com/bbm22.html
Are you the Bowser from GT?