Sabotloader

Yes I have used that plug with my 45cal SS Disc Elites.

I can't remember a great deal of difference in blow-back. But I was using large volumes of powder:

120g-150g of 2Fg Trip7 and 3Fg Pinnacle. Igniting the charge in the exact "Middle" was supposed to get the powder burning in both directions+ backwards and forwards, this caused a cleaner, more efficient burn of the powder. And I always got about 80-100fps more than the standard plug.

I also noted that it didn't take long for the Stem plug to erode the flash port, and start to open up a bit.



However, although the Green Mountain stainless steel barrels are very strong, shooting multiple "Heavy Stem Loads" Of Trip7 actually MELTED a shallow "Halo" inside the bore, exactly at the stem ignition point. You could see it with your naked eye and feel it with a tight patch and ramrod.

Now, I never heard any reports like this with the 50cal guns. probably cause there is less pressure build up in them compared to 45cal guns.