I use to have a 16" bolt that I ran the thermal on initially. I started by thinking I would be sly and hunting subsonic "so I could shoot multiple pigs before they knew what was up." The first shot they scamper regardless so the one benefit I was hoping for doesnt pan out in the real world. With 220 pro hunters on 12.1 of cfeblk it gave 1050 fps, shot well on paper but was sort of tough to use at night through thermal with that much arc to its trajectory. Had too many high or low hits on the animals and even some that I know were good thanks to the dvr that still resulted in the pig strolling away.
Here is one showing how the pigs will walk straight up to you in the dark, took a sub to the head point blank and took off. Luckily it circled around and was the final pig you see go down.
With 150 gamekings it was pretty great. It was in FC brass on 19.4gr cfeblk and got them moving at 1800 fps. It has much more autority and actually anchors pigs. This shows, again,how close they will walk up to you at night so long as you dont make any noise.
(for some reason its only linking and not embedding the second instalink)
I now have an AR with a 10.5" barrel. Im shooting a 125 pro hunter now over 19.5 gr of cfeblk which is putting them out around 1750 I think, I havent fully vetted it just yet as I got a quick load for hunting and then just havent gotten back to it to fully fill in its velocity etc in the calculator to see its longer range effectiveness, I probably never will, for what I use it for at or under 50 yards Ill never need to know. Ive only got 1 pig with it thus far but it seems to be working alright.
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