Heavy TSS 20 Gauge Loads and Possible Damage To Semi-Autos

[jflo]

Just purchased an sa20 tactical turkey. Shot a couple of boxes through it. It would not eject any light loads. I'm wondering if they beefed up the piston in the newer guns. Shot high brass and heavier loads fine. It didn't eject my hand loads 30 feet like another one of my 20s. Maybe this is indicative of some improvements to handle heavy loads on Mossberg's part. Time will tell.

[Dtrkyman]

Did you clean the gun prior to shooting?  It comes with some nasty cosmoline type anti corrosion grease, turns gummy pretty quick.

It may never shoot 3/4 oz loads but should shoot 7/8th.

[jflo]

I did clean it before I shot it. These were 7/8oz loads but I'm not concerned that they wouldn't eject. I'll never use it for anything but turkey. Just hypothesizing as to whether they are building the turkey guns a little heavier now for the heavier loads.

[bigdrumnc]

Is this specific to gas operated guns?  What about inertia guns?  There are a few 12 ga. Loads over 2 ounces.  I have been shooting 1 5/8 hand loads out of my Weatherby element with out any issue (yet) . 

[Dtrkyman]

Mostly gas gun issue.


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[Ihuntoldschool]

I did clean it before I shot it. These were 7/8oz loads but I'm not concerned that they wouldn't eject. I'll never use it for anything but turkey. Just hypothesizing as to whether they are building the turkey guns a little heavier now for the heavier loads.

You could check the manual and see if they're still suitable for up to 1 1/4 ounces of shot like the older ones. I doubt if they beefed up anything.

[lar383]

I have a Winchester SX4 20ga. Everything I've been able to read is that (Winchester's Active Valve System) can handle heavy TSS loads, up to 2 oz. As that valve uses only enough gas to operate the bolt and vents out the rest. That was one of the reason's I bought that gun because I knew how much recoil TSS has. From what I can tell after shooting TSS 1 5/8 load is the recoil is not bad at all for a TSS load...