I've been using the Ottos or for a few months now. Nothing but good things to say about them. They work well even around braked rifles. Wish I would have got them a long time ago.
Precision was 30-40 fps slower than Varget of the same charge in GT. It did produce some great SD/ES with nice groups. I think it's a good option of you can't get Varget.
I have used whidden dies for about 4-5 years now and never had any problems with them. That said they sale a click adjustable lock ring to make any idea click adjustable.
https://www.whiddengunworks.com/universal-click-adjustable-lock-ring/
I was using LC in my .223 for ever. Found primed Wolf brass for $130/k and have been shooting it since. It weighed close to the LC and my loads crossed over.
I use both .308 and .223 to train with. I really prefer .223 but I will tell you when you have one that matches the weight of your match rifle it is so easy to shoot it can make you get lazy and sloppy off barricades.