I use this 150gr supersonic 300 blackout ammo in both my 7.5 pistol and a 16.5 Ruger American Ranch Rifle. Feeds perfectly in the pistol and is amazingly accurate in both guns. When I do my part it's under 1/2 inch at 100 yards and I often put rounds into the same hole.
I have not had an opportunity to use this ammo for deer yet, but I expect it will be a game getter at anything under 150 or maybe 200 yards.
I decided to buy a 300 blackout for a new deer hunting rifle this year. I bought a 30-06 for deer hunting in 1993 and have used that every year until this year. I spent a lot of time reviewing ammunition for deer hunting with a 300 blackout. I decided to go with these 150 grain Winchester bullets.
I had the opportunity to shoot a large eight pointer this year running at 100 yards and I hit it with one shot right through the heart and it died in its tracks. I just ordered three more boxes of the same ammo and will be using this for short range deer hunting moving forward. I was very impressed and would definitely recommend this round for deer hunters. No complaints and it stopped this deer in his track.