Winchester-1897
I'm retired and have been reloading for over 46 years and you need to make a few decisions relating to these questions.
1. How often do you reload?
2. How often do you plan to buy once fired military cases with crimped primers?
3. How many crimped cases do you plan to prepare at one time?
The Rolls Royce of crimp removers is the Dillon unit at approximately $100.00 U.S. and if your loading in bulk there is no better unit.
The "best" and cheapest crimp remover "designed" to remove a crimped primer pocket is the RCBS tool designed for their case prep station below. It only removes the crimp, has a positive stop and will not touch the primer pocket walls causing scoring.
If you use a case mouth deburring or similar type tool you can over do it and remove too much brass as below when doing it by hand.
I have the RCBS press mounted swage and it is slow and tedious and hard to align .223 cases. The problem with these units is the swage is rough and it will push brass "into" the primer pocket causing problems.
I also have the CH4D unit and it is worthless, and will bend the rims of your cases and is just a very poor design putting all the load pressure on the rim and not the body of the case.
With the Dillon unit you are not removing brass you are just displacing the brass and when adjusted properly you will have tighter primer pockets, and it is very easy to use.
Reamers remove the brass and you may end up with loose primer pocket vs swaging and the case and reamer must be held.
Bottom line, when doing a large amount of cases with hand reamers it is hard on your hands and your fingers may become sore from holding the cases. So if you buy a hand held reamer and do not like it, do not try ten other types and waste your money when the money can be spent on the Dillon unit.
Trust me I went cheap trying everything but the Dillon super swage and with the money I spent trying to be cheap I could have bought the Dillon unit.
And even the Hornady unit below wasn't the answer and money down the drain with sore finger and hands added.
And doing this many cases by hand was not fun and a lot of work.
Buy the Dillon unit and buy once, cry once and in the end you will be better off.