Got a can of Blackhorn 209 about 2 weeks ago and got a chance to try it today.It was 10:30 and very hot. I shot mySavage first in the cooler temps. I shot two different bullets in it, first was a Speer Gold Dot 300g with a Crushed Rib sabot and Federal primer. I was shooting 100g of BH. No Swabbing between shot. First shot on clean barrel was high and to the left. Not too good a group.
Chap

Next I shot a Barnes MZ with the supplied sabot. Traditions sold these on their web site for $5.95 a couple of months ago. Same load 100g of BH. No swabbing between shot. Tight to load, but went down with now swabbing. Looks like I will be using the Barnes MZ in my Omega this fall. Great group, I only shot 3 shots, and the barrel was very hot. 4 wipes of the bore and it was pretty clean. The residue from the BH is very very fine, very unlike 777, which I would call gritty. I like the accuracy. I like the power,only thing I don't like is the price, butI may shootit just for hunting.I like it on first use.
Chap

I measured the MZ bullet in the supplied sabot and it was .501, just got my Cabelas calipers, nice to be able to measure accurately.
Chap

Good group there chap with the barnes. I have some I need to try in my omega, I tried pushing them through with out the breech plug and yes they were tight. Looks like another range session.

Yes it was, I just measured it and it was 1 inch center to center for all three shot--so I was very impressed. I liked the tightness of the Barnes MZ and sabot,and I think they will shoot well in your Omega with 777 and aswabbed bore or with the BH and a non-swabbed bore.Bestwishes on your range session, let us know how it goes. Chap