Greetings Poodle,
Lots to learn eh.
Problem 1. It is quite common for some cartridges to have the projectiles seated well clear of the lands so the cartridges will fit in my magazine. My
308 does but still shoots extremely well. Don't worry about it.
Problem 2. It is possible that your cases have been bulged when you seated the projectiles deeper. If you screwed the die down rather than just the seating stem the crimp shoulder may have contacted the case mouth and bulged the case. If however any of your .308 cases won't chamber. Full length size another case same as before and check. If it won't chamber your die needs to be adjusted until it does.
Problem 3. There are lots of projectile pulling devices on the market. You can even run the cartridge up through the hole in the press and grip it with some side cutters. Pulling the handle up will pull the projectile. You don't need to remove the primers to resize the cases, just take the decapping pin out and size normally. Some dies with fixed decapping pins will need the decapping stem removed for sizing. After reassembling the die run the expander in and out of the case mouth, but no further, to expand the neck.
You have just learnt some valuable lessons. It gets easier from here on. Check. Check. Check.
Regards Grandpamac.
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