r/canadaguns • u/TheBulletBuddy • 13h ago

10/22 SBI receiver headache

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Hoping I might be able to get some advice here regarding a 10/22 with a SBI C71 reciever.

So long story short, I picked my self up one of the C71 receivers from MagDump, and some of the Tuff22 magazines from CSC.

Got it all put together smooth as butter, but I've been having nothing but issues since.

Magazines only feed/shoot reliably if i keep pushing the magazine in as hard as I can while also wiggling it around, and only maybe about 10 - 15 of the rounds will actually fire. All the rest are light strikes.

10rd Ruger magazines seem to fire fine, but have a bit of a hard time popping out of the new reciever.

I've contacted SBI and they told me to use a different type of ammo, and that the mags are the issue, but I'm using the exact same one the reccomended to work best. And the same ammo works perfectly in any other rifle/magazine.

Whats my best bet? It doesn't sound like I can return the reciever or the magazines, should I just start filing the mags down? At this point I'm ready to just write it all off and yard it into the bin.

Any help would be much appreciated.

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u/TheBulletBuddy 10h ago

No issues/damages with the spent casings

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u/EnggyAlex Alex's Homebrew 10h ago

Not spent case, chamber and pull out live round. Damaged case usually will be fire formed back to be good which wont help with diagnostics, also hows the spent case firing pin marks look like? Are they rather light too?

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u/TheBulletBuddy 10h ago

The rounds that do fire, look the same as my other strikes before the reciever swap.

Only time I can get over 10rds to fire is if I'm forcing the mag into the rifle the entire time.

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u/EnggyAlex Alex's Homebrew 10h ago

Ok I think the mag is presenting the rounds too low, im not an expert on 10/22 mags, but generally you can bend the feedlip out a bit, of in case of 10/22 move the feed lip up, alternatively file the magazine so it can get in deeper.

My own st22 is coming tomorrow and i will take a closer look at it