I am about to start reloading the .375 H&H using Sierra bullets (300 gr SBTGK ,which has no cannelure); my rifle is a Remington Model 700 Custom KS Mountain Rifle (in which the significant recoil this cartridge generates is somehow weaker than in other models) - and as I have heard that cartridges with hard recoil should be crimped, I need some advice ...

Is it so that hard recoiled cartridges should be crimped? what about my particular case ?

Should crimping be avoided in bullets with no cannelure ? Or is it the "taper crimp" an alternative in such cases?

I have heard very good comments about the lee factory crimp performance and that bullets need not to have cannelure in order to be crimped with this die ... any comments about these statements? is this die a "taper crimp" type? Any recommendation about its use?

Thank you all in advance for the answers I might have !!

I've used the lee factory crimp dies in 338 win and 375 h&h and have had good success with both. 338 actually shot a little better group. None of the bullets used had cannalures. And reloading the 375 is a true joy.

Buy bullets with a cannelure! Surely they are not that hard to find. Or, are they?

I agree that the KS Mtn. rifles don't kick as much as others. I wonder if anyone knows why?

Whenever I gear up to reload the Big Boys, I always crimp. I use only bullets with cannelures or suitable candidates that can have the cannelures added without putting the bullet out of round. I believe that and proper neck tension is conducive to burning ALL the powder and less deviation between shots. I started to crimp all my handloads when I wrote Elmer Keith about some stuff many moons ago and he replied with a 4 page letter, single spaced at that.

The only place I can think of, where heavy kicking hunting cartridges are concerened, where crimping was not needed, is in a single shot rifle! Any rifle that kicks is likely to move the bullets forward in a double, or driven into the case in a magazine rifle, by recoil! Crimping negates this worry,somewhat, and takes no longer to load, than uncrimped cartridges!

Even with cartridges crimped, the bottom rounds in a magazine should be rotated to the top of the magazine, after a couple have been fired from the top, and not emptying the magazine!

A double that has had the right barrel fired a couple times, without fireing the left barrel should have the cartridge in the left barrel looked over,if the rifle has any real recoil,in comparison to a new round for length, even if crimped.

Crimp those puppies, preferably with the Lee factory crimp die.

If you use a LEE factory crimp die you do not need a cannelure. PLUS you will not push the shoulder back as sometimes happens with a roll or taper crimp, on a bottle neck case.
I own 7 or 8 makes of dies and prefer LEE dies.
I only hunt so do not know about target shooting type accuratcy.
I had custom LEE factory crimp dies made for 2 calibers, they also work great.
If you clock your loads you may find more uniform velocity with LEE crimped loads.