cayugad

I have used the sub-bases in the past but found no advantage to them for me. I am not shooting a hot enough load to cause any problems to my polymere sabots. I am thinking if you are shooting anything above 120 granis of t7 you might need these to protect the sabot. I am at school so I do not have acces to my range book - but they did make a difference in velocity. Velocity increased a little bit not enough to justify their use at my powder level.

I am not sure that even 120 or even 150 of BP or Pyro would effect the new sabots. The sub-bases were mainly an invention for the savage. They originated from a 28 guage shotgun wad being cut down as a sub-base by Toby Bridges.