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I used the factory spring, bent the last coil out to the same length as a 3 rd spring and snipped the remaining off and it works perfectly. Been using it for nearly a year and have enough rounds through it to be confident with it. No issues feeding. Yes it old fits two but I love these flush mags.As mentioned, I printed off on of the PRC mags to see how it fit in my rifle.
View attachment 877719
The design prints really nicely in the right orientation, no supports needed.
The length is right for the long and heavy bullets.
View attachment 877720
However, when using the factory PRC mag spring the sidewalls bulge out a bit from the extra pressure. This makes the magazine hard to fit into the well and sometimes the rounds will start coming out of the feed lips
View attachment 877721
I think this is due to the longer spring in the 4rd mag. I think the design would work just fine with a 3rd mag spring.View attachment 877722
I only have the one mag for my rifle, but I might pick up an L mag and see how the spring from that works.
This is a short action with factory 147 Eldms in itAnyone have a picture of the beretta mag installed?
Perfect. Appreciate it.This is a short action with factory 147 Eldms in it
Factory plastic bottom metal

FYI, ended up releasing those mags I mentioned earlier as a complete magazine with spring. Both in truly flush (2rd) and a 3rd variant. @Foster_65 has some of the final / released flush fit.
In mine the PRC length if never planning to exceed ~3" COAL. That should fit factory 6.5prc ammo fine and will allow 6prc to be seated long. Please note I am not recommending my L mags be used for PRC.So what length of your mags would you utilize for the 6.5 prc? The prc length, or the L length? I will not be reloading and using factory ammo and coal. Thank you for chiming in, and bringing this to the masses. Good on you! Ski
The one in my picture above is the beretta short action. It works fine with factory 6.5 prc but as you can see from the pic with 147 eldm, not much room if you load longer. I have just been using factory ammo and no problems so far.So are you guys using the short action mags in the link, or the long action mags for your tikka stocks (super varmint specifically if it matters)? It appears Mountain Tactical is making these for Beretta, MT's website says the short action mags wont work for 6.5 PRC. Trying to verify what will work and what wont as I know 6.5 PRC has mag/loading issues, and tikka actions have issues with certain chassis so, going with both appears to be an exercise in frustration, I am trying to avoid. Thank you for the help. Trying to decide on a Super Varmint, or ACE Game in 6.5 PRC.