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Your zero changes, not your dope. You can get a small velocity bump from a can but this would only show up over pretty long distances.

I havnt seen an appreciable change of poi in a braked rifle...

I've never shot a rifle and thought damn, wish i didnt have my supressor on. I have however had the opposite.
Lop to 20 throw a dpt can. The noise reduction makes a big difference. Especially if you...