Gunsmithing Alpha 10 rd mag no fit in Manners Gen 2 mini chassis, Accurate OK?!.

[DellaDog]

Just today found the Alpha won’t squeeze into the chassis, but the Accurates fit just fine. Anyone using an Alpha without issues? Could the chassis be over tightened slightly? (The Alpha fits fine in Hawkins DBM; same T6A stock with no chassis)
Thanks

 

[ajwcotton]

alpha mags just suck, but they are the only game in town for a 10 rd wsm mag

 

[LawnMM]

It's the mags, not the chassis, cut and run.

 

[Bandit31]

My Alpha 7rd WSM mags fit fine in the Manners mini chassis I have.

 

[Geno C.]

I’ve got a small pile of alpha mags; no wsm though. Once mine showed up I haven’t had any problems. How do the measurements compare?