Mine did the same, switch to an Aftec and adjusting the ejector solved the problem.
I also had the same problem with the mag release so that had to go.
@FTP_Shooting_Sports
Never seen a broken Czechmate frame, only barrels.
Same spot as shadow 2 cracks in?
Do you have a picture?
Might been a damaged Skoda part they used on the CM frame @yigal
10,2gr with 3N38 and a 124 FMJ gave good results, could not see difference from this load and 10,4gr SP2.
11gr N105 was a tad flatter but the powder cost a lot more since it only comes in small cans.
Have you consider putting the @kneelingatlas comp on it?
It was a clear improvement on my czechmate and I bet its more noticeable on the tanfo with the smaller comp.
Not an option since my location is across the Atlantic, it was hard enough to get it.
Any magazine.
Spring is 8lbs, it does this with 7lbs too.
Load should be plenty, 11gr of N105 under a 121gr bullet.