1989 110 30-06 staggered feed blind magazine. Converted to a 7mm Rem Mag barrel and bolt head.

30-06 rounds cycle fine. However the 7mm Mag rounds will pop out of the mag well when I start to push the bolt. It's like the magazine sides need tweaking. My buddy's going to look for the old 7mm magazine. Question is, are they different? Or should I just try tweaking the sides of my magazine?

Thanks!