Copper Threads damage

I'm going to replace a non-functional pressure reduction valve, and a
section of the water supply.

The valve has threadded brass fittings, to which I'll connect a threaded
copper fitting (3/4" threaded adaptor to the pipe).

Trouble is (seems) that these copper fittings all have chewed up
threads right out of the box. I've checked two local supply shops,
and the local big box ... all seem to be the same product.

My concern is getting a good seal, copper to brass. Both male and female
are tapered, but the resistance really builds up at just three threads
connected. When install time comes, the wrenches will tighten it a bit more,
but I don't recall the damaged copper threads or the resulting excessive
tightness of fit when I did this a few years ago? No cross threading seems
to be occuring. I've checked out this fit in a couple of the shops.

Should I be concerned and clean up the threads (like with a tiny file) or
will the threading just take care of itself?

Thanks!

PS - the supply now is - supply gate valve, 10" pipe, suppy gate valve,
then a few feet to a low-flow 3/4" valve, then a thing for whole house filter
(not in use) then another non-full flow valve, then the pressure reduction
valve ... whew!

Unfortunately, I think it is called China and outsourcing...

Glad I got of it.

I had that problem with 3/4" pvc male adpt. once. Get a black or galv. something to put in a vise and see if you can muscle one into it. I used a pipe threader when I had my pvc troubles, it sorta worked. It was only a drain pan though.

This is only through hand tightening & recollection, and looking
at the threads.

I can see where a box of these bouncing around against each
other will do some serious dinging to the edge of the threads.

The plan is to do this late Sunday or early Monday - with some
weekday time available just in case I mess things up but good.

Thanks!