I have found that with good consistent pressure I can load the first shot with any sabot. The problem IMO usually arises when you try to load the second round.

I han an Omega that was the greatest shooting MZ I have ever seen in my life. The problem was you could not get a second shot down the barrel with a hammer-and I am not joking. The barrel would not take a second shot. Not being able to load a second shot cost me a good buck a few years ago. It did not take me long to get rid of that rifle. Accuracy is great, but depenability is paramount. Tom.