This isn't meant to be a 9mm vs .45 type of thread. I'll explain my question below.
My main two rifles are a Sig MCX .300blk suppressed (or not) SBR, and I have a Sig MCX 16" 5.56 rifle. All accessories match between both for consistency. I have the suppressed .300blk SBR for home defense. Yes, I know we can argue about a a subsonic .300blk effectiveness not being much greater than a 9mm, but that's not the point of this post and my question.
I keep the 5.56 rifle ready for everything outside of home defense.
My question is in regards to supersonic .300blk vs 5.56 as a "main rifle" from a ballistics perspective, if that makes sense. I'm wondering why my .300blk rifle wouldn't be my go to for everything. I have mags of supers and subs loaded up ready to go. Without the suppressor, the .300blk has a 9" barrel.
I'm not that educated on .300blk which is the point of this thread. I'm doing some reading and digging as I speak, but I know there's much more knowledgeable people here and would appreciate their insights.
Thanks!