In the long run…….. it all depends on what you're ACTUALLY trying to achieve. Also, what will make you HAPPY, not just satisfied.
My dad (R.I.P.) always used to say:
"If you don't have the money or time to do it right the first time, where are you going to get the money or time to do it over?"
Its a lesson that at times I wish I'd have paid closer attention to at times, believe me.
As for the Paramount, I'd hold off on that just a little. Everything we've seen so far shows that the
"self-head spacing bolt" leaks. It was ridiculously evident in their first video promotion. I do know that Arrowhead Rifles is waiting for one, which when received, he'll FIX that so called, "self-head spacing".
As for extreme accuracy, I don't believe the rifle has proven itself yet at long range. Yeah, promotions might indicate it, but its just getting into the hands of some of the top shooters, which will give it a complete LONG RANGE review (>200yds). I do know that CVA was invited to bring their top shooters to the Spring Nationals at the NMLRA, which are currently in progress. Rather they showed or not is the question unanswered as yet.
As for the Cooper, and this is just me, I'd go with the Knight hands down first.
Here's some advice from a long time muzzleloader, or as the wife would say, "A guy that thinks money grows on trees". The advice above about a quality scope is without question, spot on. All to often, regardless of how high quality a rifle may be, shooters/hunters top them off with weak mounts, rings and a cheap scope, then expect to shoot groups the size of a dime at 100+yds. Honestly, it makes me giggle...………
As far as the CVA production .50cal rifles, any of them, 400yds is a LONG POKE, even with the best of bullets available for the .50cal rifles. Bullet energy drops off like a rock once you get beyond 200-250yds, even with a 300gr bullet, max production rifle charges of BH209, which will drop below 1,000fpe at 300yds +/-.
As for the Remington, I'd make the necessary modifications with the breech plug first. The X-Mark Pro trigger will work fine for most hunters as they are. As far as triggers are concerned, you can install ANY brand of trigger on a Remington 700 action. You can push a 300gr SST bullet using BH209 easily at 2,400fps from a RUM with the Gen2 breech plug with over 1,000fpe at 350yds. Use a higher BC bullet, such as a Parker Black Max, or Pittman and keep the bullet energy over 1,000fpe at 500yds.
As for the recoil, the addition of a muzzle brake, especially the LR Customs T-Rex brake, will allow a child to shoot a RUM with a maximum charge (160grs V) and a 300gr bullet. Here's an video example a buddy made shooting his RUM with a maximum charge. NOTE...……… THERE IS NO WEIGHT WHAT SO EVER ON HIS SLED.
I would suggest this...……… think about everything, exactly what your final expectations really are. Expectations that will make you happy and not just satisfied. Remember what my dad used to say...….
You can always buy a high quality scope, mounts and rings now, add them to your current rifle and go shoot. That stuff transfers to another rifle easily, well short of the mount. Do your homework first. Take it to the wife and discuss long range plans. You might be better off with just a new scope this year and save up for a new rifle next year. Just sneak closer to game till then.
Oh...…………. If you want to end ALL the problems you have now and/or those that might pop up in the future, there's a rifle for sale right here on the site, right now. Just because that is listed as a smokeless rifle, does not mean that it won't shoot BH209 and do it EXCELLENTLY. The rife in that post is a VERY HIGH QUALITY rifle and someone will get an top quality rifle buying it. Top quality is not cheap.
Good luck with your decision.