I tried the 225 Sierra's today, loaded to a COAL of 3.380 which is .075 off the lands, good groups of about an inch.

I did have primers backing out, with those and with the 200gr Hornady SP...

What would cause the primers to back out. These are FL sized cases then run through a trim die.

There is no accounting for taste.

Experience is a great thing as long as one survives it.

Generally, there ain't a lot that separates the two however,
Barely making it is a whole lot more satisfying than barely not making it.