Here's a chart with small rifle primer dimensions. CCI #41 primers are the same thickness as CCI 450s.
I use CCI #41s in my .223 Rem/5.56 NATO AR15 reloads; CC450s in my Grendel/6mm ARC AR15 reloads; Federal 205Ms in my Grendel, 6mm ARC & .223 Rem bolt gun reloads. I may use Rem BR 7.5s in my bolt guns as well. Found a full brick of them stashed away I forgot I had. I have some CCI 400s too that I might use in my .223 Rem bolt gun. I have a small stash of Winchester SRs (less than 100) that will be used for fire forming.
I use CCI #41s in my .223 Rem/5.56 NATO AR15 reloads; CC450s in my Grendel/6mm ARC AR15 reloads; Federal 205Ms in my Grendel, 6mm ARC & .223 Rem bolt gun reloads. I may use Rem BR 7.5s in my bolt guns as well. Found a full brick of them stashed away I forgot I had. I have some CCI 400s too that I might use in my .223 Rem bolt gun. I have a small stash of Winchester SRs (less than 100) that will be used for fire forming.
The trick is growing up without growing old. -- Casey Stengal