Thop, at the risk of using up too much bandwidth on this specific question, I think the answers from boats and tar baby pretty much sum up all I could tell you, except to say be careful buying the older tong tools... you must get adjustable dies to make this work.  I have the later, blued, dies that were sold separately from the handles and were virtually the same as those provided for the Tru-Line Jr press.  If you shop wisely on flea-bay or at gun shows, you can probably find an excellent press and set of dies for less than the going price of a good set of 7/8 X14 dies and have a dedicated press for that caliber.  Other dies, as mentioned by boats, can be used for a variety of calibers with just a small number of additional pieces.

If you would like to continue this in as many details as you wish, I'm available via PM or at my e-mail address, <gfrog53ATyahooDOTcom> (which can be edited to work properly.)  I may even have an extra T-L Jr press kicking around if you decide to go that way... I have set them up for several dedicated calibers/applications.

Froggie

OK, I can't resist another quick shot or two about one of my long-time loading hobbies, using and collecting the "little dies" for the 310s and T-L Jrs.  Before I had the opportunity to get a Simmons re- and decapper, I found that if I took two random 310 handles and put a decapper on one and a primer seating die on the other, I was in business at the bench.  I don't do this as much now as I used to, but it's still a great "fall back" strategy when the occasion demands.  I've made a point of accumulating as many different priming dies as possible, "just in case."

Froggie

PS  The also-ran presses that took these same small dies were the Red Head presses made and marketed by CC Johnson until about the early 1960s.  I have one of these set up using .40-65 dies (currently available) to load .40-40 Maynards.  I had to make a special shell holder to fit that weird rim, so that is really a dedicated press now.

No problem but everything I know about them either got from Froggy or made up myself.  He is the clubs expert on anything Lyman.  That Red-Head press tidbit is new to me and worth exploring.  I need another True Line Jr too.

Boats