I think I already know the answer, but I bought a bunch of plain base .30 cal. boolits at a very good price, because they don't have gas checks. This was before I read about how much GCs help at higher velocities. They weigh 115 gr and 165 gr.
I don't own a sizer (yet), but is there any way to put GCs on the base of these non-GC boolits? I plan on shooting them out of a 30/06 Rem 760 carbine w/18.5" barrel.
I do not want to use any kind of fillers-had bad luck in the past with them (my fault).
I could just use the 115 gr. as low speed plinkers, but thought there might be a better way.