The press is cast alloy. It wouldn't be my choice (space here for all the Lee alloy press owners to chime in), Its the bottom of the RCBS pile.
I'd be looking for a good older second hand cast iron press. If you end loading something more grunty than your Grendel it's better to have a robust cast iron press when full length sizing.
My cast iron RCBS press is coming up 50 years old. Still in great condition with no unecceptable slop or wear. It will outlast me and I'll need to make provision for it in my will.
The scales supplied in that kit would be suss as well. Although they are beam balance type the latest RCBS scales have a bad rep for quality, most likely Chinese in origin. All the older scales were good quality usually made by the Ohaus Scale Company in the States. RCBS along with other reloading gear companies badge engineered their scales ie used Ohaus and rebranded.
You won't need to crimp your Grendel, despite what Richard Lee says about crimping in his book. His theory is that powder combustion is more consistant with crimping. I haven't found that to be the case.
I only crimp one of my loadings, a 32/20.
Only necessary for auto loading pistols where the projectile can move in the live rounds in the mag under heavy recoil. Of for the behomoth African rounds, again to prevent projectiles moving under heavy recoil.
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