Dennis, If you are talking about the Lee Powder measure that uses the disks the answer is yes, I have had some issues with mine back when I first started reloading and I bought the Lee micrometer adjustable charge bar. that seemed to work but once in a while the retraction spring would hang up and not reliably slide the charging unit back into place. And if I ever forgot to replace the cap on powder hopper, that sudden snap back would kick out powder all over my reloading table. Sucked when that happened.
I bought the Lee Perfect Powder Measure stand alone unit and have not looked back. I bought four and mounted them on 3/4 inch MDF blocks to cover my major calibers - 9mm, 40 S&W, .223 Rem, and .308 Win. My son got me the Hornady Lock-N-Load Auto Charge Powder Dispenser and that is a wonderful addition to my reloading bench.

My first reloads were for the .357 Mag using H110, I researched data on the load to get velocities that closely matched the original FPS and when I headed out to the range, my wonderful shooting Taurus 689 with a 6 inch barrel turned into a bear to shoot. I reloaded 300 rounds and have 275 left from that original batch. I now reload to more common FPS (1380/1400 range) using SR7625. They don't make it any longer and when I run out, I'll have to switch to something else. I liked the SR7625 because it works in my 9mm, .357, and 40 S&W...and having a common powder makes life easier.

If you have any questions, let me know. Below is what I started with when I began reloading. For some reason, a person gets a lot more stuff over time.

 

I have the Lee Auto Drum, and it leaks out (I put a paper plate between it and the expander die to catch it). It’s a very fine powder, so it works its way into tight spaces. It’s an awesome powder, though. It gives off that perfect gun smoke smell, too.

 

Sorry, zero troubles with it here and I use it for both .357mag and.300BO.
But I use a RCBS Uniflow I've had for decades.

 

I have two of the Hornady Lock-N-Load powder measures and have had zero issues with H110 powder. I use H110 for all of my 300 Blackout loads. When I use the IMR 3031 for my 5.56 or 308's it gets a little harder at times, but I just chalk that up to it being an extruded powder and it needs to cut through the length of the extrusion.

 

I have two of the Hornady Lock-N-Load powder measures and have had zero issues with H110 powder. I use H110 for all of my 300 Blackout loads.

What's your load for 300 BO using H110...and bullet weight?

 

I also use a lot of H-110. occasionally my manual powder dispenser's handle will get hard to turn but it happens with all powder types. I think its caused by a broken grain or something getting jammed in the drum. it doesn't seem to affect the charge weight.



Wicked- my hunting and all around 300 B.O. load is 18.3 gr of H-110 and a 125 gr. SST bullet. it chronos 2170 fps. out of my 16" bbl and about 120 fps slower out of my 9" bbl. its deadly on deer & hogs!

 

168gr Hornady BTHP with 16gr of H110 has been a good plinker for me.

 

You are bringing the pressure curve way back.... but if accuracy is there you're ok.

 

Anyone run any of the SPEER 125gr TNT JHP's with H-110?
I might be ordering some.

 

I also load the TNT (and other 125 gr. bullets) with 18.3 gr. of H-110.

 

the magnum is to insure ignition, 110 can be a bit futzy about being lit off sometimes.
if it isn't you can have a start stop start again situation,,, bad news.

 

Runfiverun, that's good info, thank. My preference would have been to use IMR3031 to reload the 300 BO round. That's what I use for .223 Rem and .308 Win - and I would have a common powder. I have not needed to reload 300 BO as yet but will later this summer as I plan to get out to the range more this year.

 

I use regular small rifle primers for all my 300 BLK loads & H-110 with no problems.

 

many SR and SPM primers are pretty much the same thing.

3031 ain't gonna work in the 300, not to say i wouldn't try it in my bolt guns with a cast bullet, but in an AR your just gonna make a mess.