I am not sure the suppressor will affect accuracy nless your projectile is hitting it or getting very close to it on exiting. And if it is hitting it, then the issue will be with alignment rather than wear.....If it is aligned correctly when fitted, the projectile should pass through with no issues and a suppressor will handle thousands of rounds befre it really starts to get dirty and need cleaning or attention (Unless you are using a particulary dirty powder....)
Alignment issues could be caused by not spinning it on / letting it get loose onn th ethread so it has wobble....or the thread may or may not be correct...
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