I loaded up some .45 Super for a friend and some for myself with 200 grain Hornady XTP’s over 10.6 grains Power Pistol. I’m planning on shooting them mainly in my M625, but I wanted to try some out in my 4516. I ordered a Sprinco dual nested spring to replace the original single spring and gave it a good cleaning when I took it apart to install the new recoil spring. The solid stainless steel frame seems to be plenty strong enough to handle the rounds. After all, I run some fairly hot rounds through my CS10 with it’s alloy frame on occasion with no ill effects. I only ran one mag through it mainly because I didn’t want to lose any of the .45 Super brass and don’t want to stress the frame too much. All six rounds fed and fired flawlessly with some powerful recoil. I propped my phone up and attempted to get video of a few rounds, but the concussion kept knocking my camera. I did manage to capture two shots.

.45 Super in a 4516 - YouTube

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USS Brewton FF1086
SWCA#3597

Be curious to hear how well it works for you and the platform.

Many many years ago I had an AMT .45 Win mag. It was a lot of fun. One of those I should of held on to. Back then I didn’t keep anything too long.

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"If the glove don't fit, you must acquit!" ???

The dual/nested recoil springs are for the skinny (.237") guide rods & the single recoil spring are for the fatter (.290") guide rod.

Did you convert to a .237" FLGR & install a bushing in the slide to hold it centered at the muzzle end?

I wouldn't worry too much about the stainless steel 4516 frame, should be plenty strong but I'd think you'd need more recoil spring than just the Sprinco for 45 Super?

In my "Genesis: 4013 to 1013 to 1016" thread I briefly ran it as a 1016 mainly in hopes of being able to have a 10mm Auto compact with the stronger 4516 stainless steel frame instead of the 4013's aluminum alloy frame.

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