I've been single stage loading for my AR10 for some time but recently dove into a progressive (Dillon 750). I have a few single stage loads that are sub-moa with SD's in the single digits. I'm by no means a guru and have been hand loading for about 3 years now. I load for practical accuracy overall but I've gotten great results with .308 as it's a somewhat forgiving cartridge to load for.
When I moved to the progressive, I knew there'd be a learning curve. I started out with 9mm, then 300 blackout supers and subs. I'm now on 5.56 before moving on to .308, mostly because Dillon's carbide rifle die for .308 is taking a long, long time to get delivered. Like I'll get two suppressors delivered before I get my die. It's plain ridiculous. Yes, I can use another die but I'll be processing a lot of military brass and want the extra lubricity when processing a few thousand rounds.
Anyway....I've learned a lot along the way and you can very much load precision ammunition on the Dillon but there are definite gotchas and don't necessarily stick to Dillon parts (if you go Dillon) especially when it comes to powder delivery systems. There are certain powders that'll meter just fine with Dillon's powder dropper but I've moved on to the RCBS Uniflow III and case activated linkage kit. For extruded, like Varget, I'm going to use the Lee Auto drum which uses a wipe. I have the Lee Perfect Powder Measure and it throws big extruded powders and it's spot-on. Not so much with the train wreck of a Dillon powder dropper. It works fine with some powders though but I invested a lot of time/money trying to get it to work. Threw VV pistol powder just fine but wouldn't throw H110 worth a damn. I also have an RCBS Chargemaster to throw powder off the machine and drop it into the case using an Area 419 funnel.
Now that I have a system down and understand the needs, I really like the progressive press as it saves a lot of time. I do split the brass processing and brass reloading up. I process the brass and load the brass on separate tool heads. You don't necessarily have to do it this way but I'm aiming for practical precision. I anneal and trim off the Dillon. I also ream and unify off the Dillon for precision loads. Otherwise I just use a Dillon swage off press. I can swage a lot of brass in a short amount of time. Some of the more expensive machines allow you to swage with the progressive press itself.
Bottom line, find the machine you want and then triple your budget. Maybe you can come close if you're just loading for one one cartridge but don't let the entry price of the actual machine fool you. Welcome to the rabbit hole. Full thread here:
https://www.snipershide.com/shooting/threads/dillon-progressive-purchase-advice-needed.7109650/