Failure to feed

Hey yall

Recently built vz 61, RTI parts kit with barrel and a Czech semi auto receiver from ReconOrd, magazines original Czech surplus from max arms website.

Had first test fire with it yesterday, and constant failure to feed, I figured it was just the magazines? Since I noticed springs getting stuck/not having alot of upward force for the rounds to properly get chambered. I also noticed rounds getting mis fed and the bullet itself being pushed into the round, which makes me believe too much recoil spring tension on the bolt maybe?

Not completely sure, the gun had a few runs of no issues of firing 10 rounds, but other than that constant issues. Any suggestions?