Springfield Armory 9mm Pro Recoil Spring Weight

[STAMarine]

Even with the substantially radiused Firing Pin Stop on the 9mm, 5", SA guns, a 12# RS is God's plenty, assuming you're running the OEM weight MS.

Everything is stock. I've only put 600 rounds through it. I was advised on another thread that there would be a slower perceived slide velocity, but a few times I've had to nudge it into battery using WC Vickers mags. Its just a nudge and only three or four times, thats why I believe its on the ragged edge.

[gaijin]

With 9mm carry ammo I run a 12# RS and a 10# with range ammo.
I run 21# MS, the MS and amount of or lack of (like a FBFPS) Firing Pin radius do the most to retard slide velocity.
I look at a “Recoil Spring” as a “Return to Battery” spring primarily.
(In a Wilson, couple Custom Colt builds and 3 DW- all function fine)

If it can easily strip a round out of the mag, it’s sufficient with 9mm IMO.

As you noted, if it hesitates stripping a round from mag, changing RS is a good starting point.
And yes, a lighter RS does seem to slow slide velocity into battery.

Forgot to add; a heavier RS accentuates the muzzle “dip” as slide slams into battery.
The less of this a shooter has to deal with, the quicker the following shot.

[STAMarine]

With 9mm carry ammo I run a 12# RS and a 10# with range ammo.
I run 21# MS, the MS and amount of or lack of (like a FBFPS) Firing Pin radius do the most to retard slide velocity.
I look at a “Recoil Spring” as a “Return to Battery” spring primarily.
(In a Wilson, couple Custom Colt builds and 3 DW- all function fine)

If it can easily strip a round out of the mag, it’s sufficient with 9mm IMO.

As you noted, if it hesitates stripping a round from mag, changing RS is a good starting point.
And yes, a lighter RS does seem to slow slide velocity into battery.

Forgot to add; a heavier RS accentuates the muzzle “dip” as slide slams into battery.
The less of this a shooter has to deal with, the quicker the following shot.

Ah, it feels weird anyway. I'm used to a .45. This is the first 9mm 1911 I've shot.

Thank you for the info on spring weight. I'll pick up a 12 and see how it works since we don't even know what the OEM weight is.

[Pappabear]

Everything is stock. I've only put 600 rounds through it. I was advised on another thread that there would be a slower perceived slide velocity, but a few times I've had to nudge it into battery using WC Vickers mags. Its just a nudge and only three or four times, thats why I believe its on the ragged edge.

SA doesn’t suggest using WC mags. Mine wouldn’t lock back and I contacted SA and they said use other mags. I forget if it came with Tripp’s or .....only mags I had issue with was WC. Ran fine just no lock back. Just an FYI

PB

[ejr490]

Thats interesting because my Range Officer doesn't lock back with the stock mags, but does with the Wilson's!

I don't know what the stock SA spring is but I tried the flat wire ones from Wilson's and can't say it really did anything. Your mileage my vary of course just saying my experience. Have not really experimented with the recoil spring in the 9mm yet. So this topic is interesting.

Ed