I have a 12 twist 223 AI and it can stabilize 69gr sierra's, so I would not worry about the 53gr, you can always make up for slower twist to stabilize a bullet with higher velocity.
I can even stabilize those same 69gr Sierra's in my 22-250, and that has a 14 twist, they only thing is you have to send them with authority.
Dean
That's not stable that's just not enough time to wobble.
"And you shall know the truth, and the truth shall make you free.” John 8:32 (New King James Version)
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