well I did use a 300 ulta mag rem 700 sendaro a very good flat shooting rifle and I have taken about 5 nice size bucks with that gun at about 300 to 450 yards normal for were I hunt down south but here is the problem with that gun
its weight is almost 30 lbs with scope and all
As most Coues hunters we lug around a ton of stuff so its heck
Also as far as Coues deer the 300 ultra is over kill even with a smaller grain its over kill and the biggest thing of all is the price of the ammo your looking at about $40 to $55 a box of 20 if you load them your self it a lot cheaper but if you are like most of us you don’t have the time
And it is hard to find good 300 ammo that is in stock
I think the next best thing again this is only me and my two cents is a rem 700 308 varmint
Its a lot cheaper then the 300
There is allot of things that you can do with that gun
I got mine for a steal
but I did change a few things on it first I took off the cheap stock the org stock is not good I put a H-S Precision stock then the trigger that comes with is ok your able to change the pull on it
But I took it off and put a after market Jewell Trigger 2 lds and that is adjustable
The barrel length is 26” very good for long shots
The heavy barrel is good but it’s heavy so its up to you on how much you want to lug around
the entire rifle is at 25 lbs
The ammo is fairly cheap but you can find it any were most places sell it
Good luck