muzzle break ?

[nocken n notchen]

I have a M70 375h&h i think it had a 24 inch barrel after the break was put on years ago early 70's it's now 22 3/4 not sure if i will lose a ton velocity or little to not notice im currently starting to reload for this gun 270 grn hornady rl 15  72.5 grn just asking what you all think

[carpsniperg2]

You are not loosing enough to worry about. Your should I am sure thanks you