I'd run a test if I were you...and I might add, that in loading for a half dozen M1 Garands over the years, I've never needed to crimp any ammunition, nor resorted to the use of small base reloading dies..my dies were Lee and RCBS. I have no experience with the Remington Semi-Auto's however.
As to the test recommended above: I'd load an entire magazine of your own reloaded ammunition, then fire the entire magazine except for the last round. Remove that round and measure its final overall length, noting that after being subjected to the recoil of the preceding rounds in the magazine and to its own chambering. Compare that length to its length as you loaded it fresh from the press. If there is no difference, you're good to go. Doing this for several magazines should tell you all that you need to know.
You might note too, that without a crimping groove in the proper location, an crimping effort you impart is actually deforming the bullet. Generally not a good idea from an accuracy standpoint.
The American Rifleman's "Dope Bag" once recommended testing for the necessity of a crimp by pushing the loaded round against your workbench or other suitable surface with a pushing force of 40 lbs. If the bullet did not move with that amount of force, they considered it safe for a semi-automatic action rifle.
Rod