I'll toss in my two cents worth on these Shooter's Ridge high cap mags.
I got the last two at Sportsman's Warehouse. I've been out shooting twice now and this is what I've experienced. With Federal Champion 525 round Value Pack copper plated hollow points I've been getting about one nose-up jam about every other magazine load. Most are easily cleared, just lock the bolt back and tip the round out. A couple required some coaxing with a screwdriver. That's a total of 300 rounds of the Federal. I've never had Federal ammo jam in this rifle (a newish 795) using the standard 10 round Marlin magazines. I've also fired 150 Blazer lead round nose, and they've been 100% reliable, no jams at all (in the Shooter's Ridge mag).
The lsho in my rifle doesn't work with this magazine. At least with the clear plastic I can keep track of the rounds that are left and when the follower gets to the bottom of the feed channel, I know it's empty.
I can get 26 rounds in each of these 25 round magazines.
The mags have locking tabs on the back so you can connect two magazine together, and they seem to work okay. Just to be safe, I wraped a lap or two of packaging tape to make sure they stay together.
If I get a chance, I'll get out next week and try these mags with some Mini-Mag round nose and see how they work.