Re: .338 LM recoil... What's it like?
I've been shooting the AI rifles in .308 and .338 for quite awhile & both have similar factory brakes on them, (Single chamber on the .308 and dual chamber on the .338), they are the kind where it is mostly straight out the sides with a bit of a curve internally towards the rear.
Both come in around 18 to 20 pounds when loaded up with all the stuff.
The recoil on the .338 is a fair bit more than the .308 one, but especially in prone it is not that much of a problem.
You can get much more agressive brakes that will soften up the recoil a lot more, the only issue will be the overpressure blasts getting your head pounding a fair bit.
It is not a gun you want to blast away with all day long, but you can easily do 20 round strings.
The biggest issue with the .338LM is that the rounds are expensive, so you either need to reload (in which case you can be around the $2 range +/- per round), or have another gun such as .308 / .243 etc that you can use for getting a lot of round count in for your fundamentals practice, and then shoot the .338 so that the shots count.
I did see a Sako .338LM at the local gun store, it was the hunting model with no brake and a super light plastic stock, internal round storage only, and not much of a recoil pad to speak of, the gun felt like less than 10 pounds. Apparently the owner shot it a couple times and headed out to resell it pretty quickly. so the moral of that story is Heavier is better!