Thanks for all the advice, I have not reached out to the course instructors yet (I will), I thought I would run this past CGN first. If the course instructors are good with 223 I will stick with that, I have all the components for cartridges at home ready to be built up, I was planning on building up a faster load as my calculator showed at 2550fps I would drop below the speed of sound before 1000yds and I understand that this will make things extra goofy. I will math it out with the Nikon and see if I need a -20 MOA rail or if I have enough turret adjustment plus reticle markings. If 223 will not suffice, I do have some other rifles I may be able to use but the rest of the fleet is in the hunting rifle realm.
During these courses, how fast and sustained is the rifle fire. For example my 300 mag will be rather warm after a five shot group and I typically let it cool to ambient before shooting another string. My 223 on the other hand with it's bull barrel and wee cartridge barely heats up at all. Is there time to allow the rifle to cool or would I be losing trigger time letting things cool?
Thanks
Windy
You switch back and forth with your spotter and let your rifle cool.