Unless you are roll crimping in to a cannelure I seriously doubt that crimping is doing anything to reduce the likelyhood of bullet setback. 5pins has it right - it's all about neck tension. The Dillon size/TRIM (not crimp) die makes this a non-issue as the neck tension is crazy high.
Here's a test. Measure cartridge OAL. Using both thumbs, press bullet against a piece of wood as hard as you can. Re-measure OAL. If it hasn't changed you should be good.