Longrangesheriif,
Unless I'm just missing it, you haven't stated whether you want a hunting rifle or a target rifle or one for a combination of both.
The McM A5 is typically a tactical or target rifle although I've build quite a few for hunters who like the ergonomics of that stock. I prefer the A3 for hunting but again that's up to you. These stock can be found ready to ship on Mcmillan's 'special for sale' part of their website.
https://mcmillanusa.com/mcmillan-gunstock-specials/
If they don't have one of the style you want right now, give it a couple of weeks to see what the next batch of stocks has to offer. Then again you can always try Stocky's but I find that they don't have anything for a decent price that I can't get somewhere else by doing a little searching.
Tom Manners also has a ready ship section so give it a gander as well. Sometimes you can find one there that is ready in the configuration you want with no waiting or just a little waiting if you need a small amount of work done; paint, bottom metal, etc.
The new models of Timney triggers are just like Leupold scopes, over priced and under delivered. The only reason they cost as much as they do is because Timney jumped the price points up to stay in balance with Jewell and a couple of others so they didn't appear to be the economy brand anymore. The dumbest buy right now are the Bix & Andy's at over $400.00 just for a trigger. Yes they're nice but $400.00 for a trigger is stupid. There is nothing wrong with a Jewell in a hunting rifle as long as you keep it clean, just like any other trigger which can get dirty with use and environmentally contentious situations.
Jerry makes an O.K. action if you simply want a Remington for more money. My first choice would be a Defiance action in the configuration you want. Personally, you can find a stainless steel Remington and get it blueprinted while still having a custom rifle. Resale value will not be as high as with a true custom action but Stiller's aren't at the top of that list either. For potential resale I'd go with a Defiance, Surgeon or Borden.
The .300 Win. Mag. is a great choice for either hunting or long range target. There is a huge and ever growing selection of bullets, brass is available and there is a ton of reloading information on the internet or in print.
Enjoy the process!