Predator Polymags .25 how are they preforming for you?

Work great in my 2 FX guns (Royale .25 & Boss .30) but they're original Smooth Twist barrels. You might have to clip the tips to get them to fit in the magazine but it doesn't affect accuracy. PM me if you want me to send a sampler to you. Ask Bigragu, he'd know! Gerry

Gerry thanks for the offer, I have a tin someone gave me. I just loaded the mag for the MK3 and seem to fit fine. I have the new 16 shot mag. Should I still cut off the tips? I am hoping to be able to try these out this weekend. I was hope some guys would chime in a give me a speed range I could shoot for. Right now I have the Hades .26 grain at around 925fps. 
 
Cant comment on use in an FX, but I use them in my Mrod (Hill max power kit) and agree, they dont like speed much. Much like the HN Hornets they started to spiral at higher velocities. Slowing down the video from the ATN shows it. I also noticed over-penetration at 30yds. Right through a squirrels head. Lead and tip. I find the pellets lodged in the fence behind the bird feeder. Love them for trash pandas and skunks. 
 
I’ve had good luck with Predators in all of my guns They’re accurate and they really have a lot of stopping power with very good expansion. Great for hunting squirrels.. 
i shoot .25 cal so they weigh close to what a JSB King weighs. Shoot them like kings up in the 900 FPS range or a little higher. 
Can’t hurt to give them a try. Odds are you’ll like them