Guys you all are amazing, thank you so much for all the tips.
Is the redding die really that much better than the Lee die?
No.
I would ignore most of the advise in here. A large number of them are not high accuracy/competitive shooters, or they wouldn't be giving you 30+ year old advise.
Get you a good Bushing Full Length sizing die. Measure your brass, and get the corresponding bushing AND mandrel that gets you your desired neck tension (.001-.003 depending on if Bolt or semi).
Redding is overpriced shit. If you want a great set, the RCBS Matchmaster FL bushing die set with micrometer seater CANNOT be beat for the price. Around $150 for the set or $75 if you are mil/leo.
If you don't want the set, IMO Wilson makes the finest FL bushing dies before you get into the gucci stuff like Widden, SAC, ect. They are around $100 and machined perfectly. Forster makes a great micrometer seater to pair with it, and you can get both for under $200.
Pick up a 21st century or Sinclair Mandrel die and the corresponding mandrel.
What you are doing when you size is pushing the neck back ever so slighly (.002-.004) to ensure reliable feeding while not overworking the brass. When you you fire, the case expands to the chamber due to brass's ductility then springs back ever so slightly. The spring back is not enough to ensure reliable chambering of the round, so you have to size it. Then the mandrel uniforms the neck and opens it back up to propper neck tension. Think of it as pushing and then pulling.
Now if you really want to go gucci and save some time, Pick up the SAC FL Modular Sizer. Its going to hurt the pocket book, but you can add an integral mandrel inside the sizer so its one operation instead of 2.
Virtually everyone shooting at a high level is doing some variation of the above, with many adding annealing into the process. We do it because its reliable, repeatable and just plain works.
Your SD/ES will drop a great deal once you control neck tension and no longer will you have to worry about hard chambering or not being able to chamber.
Go talk to guys at your next match , the actual good shooters, and they will tell you what I just said.