What oddball AR-15 calibers you shooting?

Running a 6x6.8spc incarnation called the 24 Varminter here. I've shot a lot of coyotes and other critters with it. It's accurate and effective.

My only complaint with the 24 varminter is the initial trimming of brass. Seems like a lot of unnecessary brass shavings removing neck length that could have been left alone. If I was to do it again, I'd want a version that is simply a necked down 6.8spc and leave the neck long similar to the 222 remington.

I ended up getting rid of all my wildcats except this one. It will be the next on the list to sell.

The reason it needs to be trimmed is to fit the projectile at mag length and be seated in the brass so its in the sweet spot.
 
I'm an AR guy that loves odd calibers in the platform. Give me inspiration to build another odd one.
5.45*39
Hornady 52 g BTHP sized down from.224 to.221
24.5 g cfe 223
 

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