The Lee 55 has become one of my easiest moulds for running on"pace".The sprue base cut,determines the speed.
Too hot/fast and it'll pull a bit from base.Slow and low,the base gets a slightly raised,excessive hump.Makes in incredibly easy to get,just right.
Haven't cleaned it,didn't adjust anything,only half arsed preheated.....but get the mix right,pace right.
Got tired of weighing,they are at around 90% spot on weight.They ones that aren't,are obvious....meaning a little"blip" in a drive band will show up lite on scale.
Am only lubing the space above GC.Which I do with a little swipe of lube on the tip of a pen knife.YMMV on sizing created bending of bullets.Be careful here.I machined up a nose sizer/uniformer to fully support it whilst seating GC.The balance of bullet is as cast....nose gets attention,GC meticulously seated...rest of bullet is untouched.
Alex Wheeler has some u tube vids on finding the lands,or seating depth.In my rig,the jam length is set for resistance using his basic methodology.The Lee nose is that well fit to the leade/bore that you can feel it on bolt close.It's a cosine measure by feel,which is supported by having the nose sized.
Neck tension,seating pressure is gaged somewhat by carbon blowback on neck,obviously effected by pressure burn rate and curve.But not "that" hung up on powders.Get a cpl of favorites and a target velocity and go shoot.Listen to what the rig is telling you during it's recoil pulse,and how it behaves on the rest.Try shooting off a Harris bipod.Certain rigs/pressure nodes can really wake up acc wise off a Harris....vs the rig squirming around,looking for a "set" in your BR rest/bags.