I'm looking to reload one caliber (45-70) to approximately hornedy 325 ftx pressures for one rifle.
Bottom-line on top: That Lee press would be fine for reloading for one caliber in my opinion.
However, note that to load Hornady FTXs require a specific "trim-to" length due to a longer ogive than other 45-70 bullets. My Hornady manual says trim to 2.040", which is different than the trim to length for bullets like the 300g or 350g flat points/round nose of 2.095". I use the Lyman EZEE Trim with a cordless drill for most trimming, but would need to modify the pilot to trim to the shorter length for the FTX. I highly recommend the EZEE trim, btw. Inexpensive, very easy to use, and effective.
This whole thread has me thinking a bit though. Reloading isn't really for part-timers or folks that want to cut corners (*not* implying that's what the OP is doing, btw).
If I can find factory ammo:
1. with components that I like
2. that shoots well in my rifle(s) and
3. for an acceptable price
Then I shoot factory ammo. If not, I reload. To be safe and effective, reloading requires good equipment, good components, a willingness to read/continuously learn, and *acute attention to detail* IMHO. I've read all the manuals, watched loads of how-to's, have been reloading for years and I still learn new things all the time.
I started out with a Lyman kit that I found on sale. I've replaced everything the kit came with but the press, the reloading trays, and the powder funnel over the years. I love to reload and find it incredibly rewarding, but a basic reloading set up, even for a single caliber, ain't cheap.
Quick review of MidwayUSA suggests that a 45-70 reload with a 325 FTX would cost about $0.95 per round, only accounting for powder, primer, and bullet (excluding brass, which is $0.50 to $0.95 each). A box of the ammo is only $1.60 each ($32 per 20). Basic Lee kit on sale for $140 currently, plus quick trim die (which may not even work with the FTXs), plus 45-70 dies, now you are at $184. So breakeven is 283 reloads excluding brass, labor, a reloading manual, and a few other little things. Assuming you could get everything on sale and free shipping, btw. Analysis all very much US-centric, of course.
I'm not saying don't reload, I'm simply suggesting that reloading to save money isn't all it's cracked up to be.