RE: Need advice on recurve
The Cougar is a great old bow--Pearson bows don't get nearly the credit they deserve, IMO.
That 45X@28 means you are pulling 46@28, if you are getting a full 28" draw.
You can shoot the 2314's and not hurt the bow, but you aren't going to get good arrow flight (way overspined). It's been too long since I've shot aluminum to be able to give you a good idea of what spine will work better for you--maybe a 2016 or 2017 (with 125 grain points)? Just remember to keep your arrow weight at 8 grains of draw weight or more per pound of draw, to avoid damaging the bow. For example, if you are pulling 46# on it, you need a finished arrow that weighs 368 grains or more.
Good luck, have fun, and ask all the questions you want.
Chad