[tumblindice]

PS I replaced both guide rods—plastic!—and the stock 13 pound recoil spring in the 97 with a Wolff 16 for FMJ.
I don’t know who makes the SS guide rods now, sorry.

[Bloody Sam Roberts]

with a Wolff 16 for FMJ.

Given that we can always learn new...why would it be necessary to use a heavier spring for a FMJ round?

I ask because I used to own a Firestar M43 9mm that had ejector problems...1 per mag would fail to eject and jam the action. This was supposed to be resolved by installing a newer, beefier ejector/spring assembly.
It did not resolve the problem but putting in a Wolff 24lb recoil spring did resolve it. The factory spring was a 16.

But the problem manifested no matter what type of round I used.