I've just started reloading for my .223, it's also the first time I've use a full length sizer as can be seen in this blurry pic where I didn't back the die out of the press properly and gave a good hard yank on the handle.
Anyway you definately get more of a "feel" of something happening with FL sizing unlike neck sizing which seems more like guess work to me.
I wasn't sure whether the 50Grn VarmintGrenades would stabilise in my CZ so I bought some 50Grn Blitzkings. I made up 16 VG's with 25grn up to 25.9grn of H335 and 3 Blitzkings with 25Grn H335. I set them all to the same OAL as the homeloads that a guy made up for me a while back thinking I'd have no problems. I didn't bank on the VG's blunter profile and luckily I tried to chamber them before I left the house and they jammed straight into the rifleing! Lesson 1 always make u a dummy round and work out the distance to lands! Being in a rush I had to re seat them a bit at a time until they were no longer touching with a COAL of 2.210 the Blitzkings had plenty of room and they were left at 2.245.
After reseating the VG's i was a little concerned about excessive pressure due to them being so long and set so deep into the case. I pulled the trigger anyway and fired 2, the primers did look a bit flatter than normal so i fired the 3 Gamekings, they looked no different so I assumed pressure wasn't an issue and I went ahead and fired the rest, checking the cases each time I went up .3grns. At first the group seemed acceptable, apart from a weird horizontal stringing that my rifle has never done before. The Blitz's were smack on, assuming I pulled the last shot. The loads 25.3grns to 25.9 were all off to the top right of the targets and a couple of inches apart, strange but when we finished firing everything off I realised the mod had come slightly loose so may have accounted for the weird grouping so I came away with more questions than I started with but my mate shot a crow at 160yds with my x6 Swarovski and one of the few Blitkings I have left so all was not lost
One thing I did learn was even after passing through a 3/4inch ply board the grenades still blew big holes in the ground, far bigger than the Blitz's. So much for exploding when hitting a grape eh!