I got pretty lucky a couple months ago a local supply shop that supports the competitive shoots locally sold me two 8 lbs each of Retumbo, H1000 and Ramshot Mag at regular price. I haven't tried the Ramshot Magnum in my 300 PRC yet as I'm now short on Bullets and can't use them up testing. Seems if you get one component, I'm short on another one!
To the OP:
Gunbroker has stuff but it will cost you.
Find a local gun shop that will add you to a wait list. That's what I do and have picked up quite a bit of RL26/33 and 6.5 Staball that way.
Midsouth got a bunch of H1000 in stock back in June and it has showed up on Hodgdon' website a few times recently as well. I scored 8 pounds from Midsouth but I also like 7977 which has eluded capture.
I recommend you open an account on AmmoSeek.com you can set up a total of 10 searches for powder, primers, bullets or whatever you want. When an online retailer shows it in-stock AmmoSeek will text you a link. If you act fast you may score. Good luck
Holy mackerel! Just went to gunbrokers and saw IMR4831 for $85/#!! That's Highway robbery! Man, the situation w reloading supplies has got to get better! It's crazy!
Before the "shortage" I usually test a few different powers with each bullet style? I have shot some RL 17. RL25 & Magnum with good results, comparable to H1000! I actually have had really good groups with R17, not sure why its not mentioned much, tempeture sensitive maybe ? Only problem I have seen with Magnum, it does not meter great, get more over charges out of my auto scale.
Stopped by my local gun store the other day just to see what they got in for pistol powder. Salesman told me he got H1000 in stock. So it seems it maybe sneaking back in stock.