Been running a 590A1 (20” barrel) and had a weird one at the range Friday. Recently installed a Vanguard M-LOK forend along with the OEM 590A1 heat shield, and swapped to an SGA-style stock. The Vanguard forend was extremely tight going on, had to mallet it into place onto the action tube. The nut that retains it isn’t is on and can’t be tightened any further but the notches aren’t lined up horizontally with the barrel one notch is slightly higher than the other, but it’s not stuck, just snug and won’t turn further and not cross threaded. No rubbing between the forend and heat shield that I can find, and the action cycles smooth through full travel.
For cleaning beforehand I ran a BoreSnake with CLP up front and dry at the back (didn’t fully dry it after), and separately used Lucas Extreme Duty grease and oil — pea-sized amounts spread thin on the action bars, the metal-on-metal tracks, and general sliding surfaces.
At the range: Challenger low-recoil target slugs cycled and extracted 100%, no issues. Switched to Challenger Magnum 00 buck and started getting FTEs after 1-2 rounds — fired hull physically stuck in the chamber, had to borrow a rod from the RO to punch it out. RO watched me try again with the same load and it ran fine that one time, so it’s not 100% consistent. Opened a second, fresh box (same lot) later and it did it again.
On a couple of the stuck hulls there was a small nick/mark on one side of the brass head, like the extractor was fighting to pull it free.
For reference, I’ve run this same Challenger Magnum buck (different box, same lot) through my 1301 with zero problems. I’ve also shot Federal buck through this same 590A1 in the past with no issues, before any of the furniture changes.
Haven’t cleaned it again yet to strip out the grease/oil — wanted to post first and see if anyone has run into this exact pattern before I go tearing back into it. Planning to do a proper chamber-brush-and-dry-patch clean and retest with Federal buck first before touching more Challenger.
Anyone dealt with a specific buckshot load sticking in a 590 chamber while everything else (slugs, other brands) runs fine? Trying to figure out if this is a “chamber doesn’t like this load” thing, residual lube making it worse, or something I should get looked at.
For cleaning beforehand I ran a BoreSnake with CLP up front and dry at the back (didn’t fully dry it after), and separately used Lucas Extreme Duty grease and oil — pea-sized amounts spread thin on the action bars, the metal-on-metal tracks, and general sliding surfaces.
At the range: Challenger low-recoil target slugs cycled and extracted 100%, no issues. Switched to Challenger Magnum 00 buck and started getting FTEs after 1-2 rounds — fired hull physically stuck in the chamber, had to borrow a rod from the RO to punch it out. RO watched me try again with the same load and it ran fine that one time, so it’s not 100% consistent. Opened a second, fresh box (same lot) later and it did it again.
On a couple of the stuck hulls there was a small nick/mark on one side of the brass head, like the extractor was fighting to pull it free.
For reference, I’ve run this same Challenger Magnum buck (different box, same lot) through my 1301 with zero problems. I’ve also shot Federal buck through this same 590A1 in the past with no issues, before any of the furniture changes.
Haven’t cleaned it again yet to strip out the grease/oil — wanted to post first and see if anyone has run into this exact pattern before I go tearing back into it. Planning to do a proper chamber-brush-and-dry-patch clean and retest with Federal buck first before touching more Challenger.
Anyone dealt with a specific buckshot load sticking in a 590 chamber while everything else (slugs, other brands) runs fine? Trying to figure out if this is a “chamber doesn’t like this load” thing, residual lube making it worse, or something I should get looked at.
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