Tubb speed lock firing pin for M70

[jcann]

I'm a bit of a tight wad and have been debating getting one of these for my Winchester M70. Has anyone had any experience with this firing pin? I read on a different forum of light primer strikes and miss fires. If it does reduce lock time I thought it might be worth it but if it causes problems I'll stay with the original pin and spring.

 

[turbo54]

light primer strikes and miss fires.

Yep.

Don't forget you'll need the cocking piece, too. All up its a way to spend ~$120 on light strikes and misfires.

I installed one in my FN SPR. I fitted the cocking piece PERFECT for a super smooth safety engagement. I set firing pin protrusion to .060-.065".

It does indeed snap faster than OEM, but it wouldn't reliably touch off CCI LR, CCI BR2 or Tula LR primers. At first I thought it was me not fully seating primers, as I load on a Dillon 650...so I started to be extra diligent seating primers with a hand tool. No dice.

I've bitched about it before on here, and Mr. Tubb himself popped in, argued in favor of the system, posted a white paper done up by the military about how striker energy is paramount to ignition, and how his speed lock delivers more of it.

Whatever. It didn't work.

 

[Aries64]

Tubb SpeedLock on FN A3 G

I'm a bit of a tight wad and have been debating getting one of these for my Winchester M70. Has anyone had any experience with this firing pin? I read on a different forum of light primer strikes and miss fires. If it does reduce lock time I thought it might be worth it but if it causes problems I'll stay with the original pin and spring.

My experience was the exact opposite of turbo54s' - I had a Tubbs SpeedLock (along with the CS Spring and Cocking Piece) installed in my FN A3 G and it worked flawlessly. I fired FGMM 168s', FGMM 175s', Black Hills 175s', and ancient Federal 150gr. Soft Point hunting ammo. No light primer strikes or misfires of any kind through several thousand rounds, at which point I sold the A3 G to help fund the purchase of my first PMII 5-25X[56]. FP protrusion was .065".