I tried many bullet/powder combinations and still couldn't get a decent group. Then I tried this, it worked

http://www.youtube.com/watch?v=z9cae6L9N78

I remember someone telling me that tip when I had my Omega. It did help.

Did the same on my Yukon worked also. Have the same shell holder on mine works wonderful for a quick follow up shots.

great tips. just picked up a Thompson center omega today...

good tips... fortunately my Z5 will shoot everything except PowerBelts. It does not like them. The barrel twist seems to shoot sabots best though I realize there are exceptions.

It's not the twist, but the QLA that's not straight. Common problem with TC guns and conicals.

right on... thank you for explaining that to me. I did not realize this.

Thanks for watching!

That's a simple tip.

The Z5 was my first MZ. I still have it but rarely shoot it. I floated the barrel by cutting the lids of yogurt cups to fit the bottom of the lug pockets and did a little sanding on the barrel channel.

This gun is extremely accurate. It's actually boring to shoot because it just plugs them into the same hole all day.