I always preferred the one piece bases on my rifles, both Rem 700's and Win M70's. Hoped to gain at least some small extra stiffness over the action cutout area. NEVER had any problem with shell loading, ejection, etc. in any caliber including .222, .243/6mm, .257, .270, .284/7mm, .30, and .338.
Good shooting and be safe.
LB