I dont know specifically for WWB (although I have heard of some people having trouble with cycle failures when using that weight) but I have heard som problems with using 22# springs and almost NO problems with people using the 20# spring.
I've run nothing but WWB through mine since I've had it. Since I've added the 22# spring I've experienced no problems. Never noticed WWB saying it was a reduced load. I swear I saw some stats on it somewhere (nothing like specifics :wink: ) that put the FPS in the neighborhood of 1100 which would make major power factor in USPSA matches if the stats are right and the factory loads consistant.
i run nothing but 165gr wwb through my xd40 service.
I've shot more than 600rds with the 22# and haven't had a single fte. So i don't htink you'll have any problems with it. I think the only problems with failure to eject usually come from the 9mm xd's running higher spring rates.
I have a 22# in my XD-40 Service and have not had any problems with it; I've shot Wolf, WWB, Blazer, UMC, Speer Golddots and Remington Golden Sabers without a single problem.
Although, whenever my wife shoots it, she gets about 1 failure to feed every 200 rds. Could be because of limp wristing though, I'm considering moving to a lighter spring, but will polish the feed ramp first which I'm suspecting will solve the problem.
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