Major problem!
I visited shooting range and shot some of the .338 light bullets that I made from .32 S&W long cases. Luckily I did not use supressor but had the muzzle brake on. When I went to the target, I did not see a nice little group like normally one could expect from my TRG-42.
Instead of that it looked like buckshot blast from a shotgun.
When I inspected the muzzle brake, I saw some brass in it so started to wonder could the wide hollow point act as an brake and open up the thin wall of the jacket..
Could imagine that in .224 the problems might be magnified as the wall in rimfire cased jacket is even thinner.
S