Hi,
I have been shooting percussion for over 45 years.
My #1 choice by far is RWS Dynamit Nobel 1075 caps.
They are uniform, hot, and excellent quality.
But harder to find, but make every effort to get them.
I have tried others, Remington, CCI, and others, but they really do lack consistency.
I would like to use Remington caps as they are more affordable and easier to obtain, but their consistency was seriously lacking, as the previous post mentioned, they are supposed to be better.
CCI never impressed me.
Best regards
Fred