The RZ-10 does have a ramped barrel, but I am still not ruling out case bulge as partial or full cause of the problem. I have pretty what appears to be the same problem with this ammo in my new (used) Fusion 10mm Commander that does not have a ramped barrel. However, the Fusion also has this issue with Double Tap ammo as well, which the RZ-10 does not.
Since I already have one on hand I am going to try a 3lb heavier (27 instead of 24) recoil spring in the Fusion and see if that solves the issue with Double Tap ammo. I don't expect the Underwood to work in that gun anyway so if it doesn't help with the Underwood I won't really mind. If it does help with Double Tap then I will probably order 2lb heavier spring for the RZ-10 to see if that solves the problem.
Does that sound sensible?
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03-04-2012, 12:38 PM
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