I am using a Hyskore shooting rest/vise for load testing.  I have a Bushmaster Varminter.  The problem that I am having is loading each round individually.  It is a pain in the butt!  I was wondering if anybody made any blank magazines that I could slap in so that I wouldn't have to weasel cold fingures through the chamber to make sure the round is in their properly?  The magazine also has to be somewhat short for the gun to fit correctly onto the rest.  Something like a five round clip or smaller.  Also, where could I order one?

Sinclair International has a follower to convert one of your existing mags. A 20 round works nice with this.

Sinclair Follower

I second that.  Get the Sinclair follower.

The Bobsled is really good too, but kind of pricey.