OK bought this thing today and it is a hand held primer installer. I have been fighting it for a couple of hours and have 50 rounds done. This thing is a b..ch to put together and even harder to keep together. In all fairness I was using 300 Blackout brass that was once fired and converted to 300 from 223. So primer pockets were a mix of crimped junk that I have to ream out etc. Lyman needs a lot of work with this product, their web site is Cr..p and the directions are very bad. I hope I will have something better to say about this and will update as I go along with this.   :'( Craig

Craig it takes a bunch to clear up the staked primer pockets, I used the RCBS pocket carbide cutter in hand held handle.  I like the cutter because it cleans up and uniforms the pocket.  It can be difficult with some cases to clean them up but it does work for me.  Other methods are swage types that push the pocket back open, several makes are available for that.

I was going to echo the challenges of staked primer pockets.  Moving to priming before you are certain you have all the staking cleaned up in the brass is a recipe for frustration. 

I have not used the Lyman tool, but it pretty much looks just like my Lee Auto Prime XL or my RCBS hand primer.  Both work great with properly prepped brass.

The BEST solution I have found to crimped/staked primer pockets is the Dillon Super 1050.  But  it is quite spendy.  Next best for me is a basic chamber tool.  MIne is an RCBS, but the new RCBS tool lacks the post in the outside chamfer tail.  The old one I have looks like this LE Wilson tool:

https://ads.midwayusa.com/product/1012810383?pid=789334

I chuck this up in my drill and go to town.

I have also tried the RCBS primer pocket swage dies set.  It does work, but it is a long way from fast.

I do have a hand held reamer that works but I was using the bit in my battery drill and lost the bit so I bought another and thankfully it screwed into my old handle!! This new Lyman was to speed up the whole reloading process and I have run into minor thought problems with the addition of the tumbler. You need to deprime then resize then prime and then tumble, I was getting screwed up with getting the order right compared to my old way. I even forgot the flare at one point. Now if everything works all the is done before going to the blocks to add powder and bullet. Makes sense to me anyway!  I really have the most problems doing this 300 Blackout bull sh.t rounds. I really do hate them!!Craig

Well I even got that wrong! The order should be deprime, resize, flare, tumbler, then finish. Craig

This is the cutter I use by hand
https://www.midwayusa.com/product/1458146201

Today I worked some more on these rounds using the reamer I have and it did help! Lot of work for rounds I don't even shoot!. I do feel this tool will be OK for like my regular 9mm, 10mm,40 cal. 357 etc. The main problem with the Lyman is everything is loose. The primer flippers are not good and fit loosely with the shell holder in general. I had this design years ago and it worked OK but needed shell holders made by the company that made the hand held tool. That was a turn off for me but it worked great for 38 sp. I will try the Lyman with my regular rounds next and report back as I am done with the 300 blackout for the time being.  Craig

Hey gadabout,
I am far from an expert unlike some of the others, but have struggled with some of the tools intended to complete a given task.

Ken

Yes it is a little work but the good thing Craig, is that you only need to remove the crimp staking once!  I have done thousands of 223 and 308.
Now even some pistol cartridges have staked primers in 9mm, 38spl, 357mag and possibly others from some companies...

Yeah if I continue to have this problem I will get a drill fired up. I do like the concept just need it to work is all.  Craig

Just did 100 9mm and had problems like sideways primers. and the tool just getting loose and I feel it is a piece of junk!!!!  Craig

The old Lee Auto Hand Prime tool was the best I've come across. But of course you can't buy one these days as they quit making them. I'm not a fan of the new one either. I tried the chinese made RCBS hand prime tool. That was nothing but a wreck. After having non-stop issues with it including the shellholders wouldn't hold a shell, I sent the entire mess back. I bought a Frankford Arsenal Platinum Series hand prime tool and it's nothing but the old Lee hand prime tool but on a magnum scale. The thing is huge and it's heavy. It's far from perfect in that if you aren't careful, you can get 2 primers in the ram which could make for an exciting event. It has a good feel and otherwise seats the primers with authority but the primer deck where it is supposed to turn the primers up is pretty lousy. I generally use a surgical forceps to turn the primers the right direction and avoid the headache. It comes in a so-so case for storage. The downside is the primer tray is in a friction fit pocket in the foam of the lid. It's temporary at best as mine already won't stay in the foam. It falls out when opening or closing. The amount of force used to seat the primer is adjustable, not that I use it. I like primers seated hard so it stays adjusted for max force. Other than it's heavy, no real bad complaints. You might look at one to see if it works for you. I think at one time I've had them all and there is no "perfect" one. The old Lee was close though.
Just as a heads up FWIW. I started reloading back in the early 70's. Lyman was "the" tool to have for professional results. It's all chinese crap these days. I won't even consider Lyman anything any more. I got one of their hand held cordless deburring tools. The actual tool tips are great. The cordless part is pure crap. You'd think somebody designing the thing would see to it that it would work with the unit plugged into the charger. Nope, can't have that. That makes far too much sense. So if you haven't used it in a week, you have to plan ahead to have a full charge on it at least 24 hours in advance. That won't work for me so the tips I kept and use a cheap variable speed cordless drill to run the chamfering tips while the cordless part is now a resident of the local landfill. I have a Lyman flash hole deburring tool. The cutter is fine, the rest of it is crap. Seeing a trend here?
https://www.midwayusa.com/product/1016958988