Mark 7 Power Trim XPress: 223 to 300 BLK on the Lyman Victory Press 

I've been hanging onto a few thousand once fired 5.56 cases thinking that I'd convert some to 300BLK, which I need. Without even looking at the price of this thing I've realized that it's something that would make more sense if I were to rent it for a day.

Thanks for the great introduction, that's an interesting device! I think the background in the new studio is absolutely fine, by the way. I'm sure many people expected something different. And I also think it's great that you speak so slowly, that makes it easier for me as a German to understand what you're saying! Best wishes and good hunting, Dennis

I dig that set up .

Thought I'd check price on this. Found it on midway. It is listed as discontinued. Has 2 reviews, both 1 star

I'm converting on a dillon super 1050 with a gsi tool head and RT1500 trimmer. Actually did a video on it 5 yrs ago.... still use it and does the trick with the exception that I have to clean a brass bird nest out of the vacuum hose occasionally.

I have absolutely no use for 300BLK but that is a slick trimmer for the conversion.

They need to use the cut, chamfer and debur set up like the henderson to make it worth it i think

Using a brass case already cut to the correct length and bagged to act as a standardized measurement I've found makes setup go a LOT faster on most case trimers with adjustable depth.

Awesome. The only thing that stands out in this video as a negative is that monster of a box for the power supply and how short those cords are. Its like they took a 1990's power supply tech and threw it in there. I would personally design my own PCB at 1/4 that size for that thing IMO having this on your reloading bench would be a pita. Looks like a very efficient trimmer however

Mine lasted maybe 5k of 223 brass before crapping out and, of course it was out of warranty!!

"Couple of few thousandths"🤣 That made me smile.

I'm converting by using a cut off saw to cut the case down, annealing the brass, forming using a sizing die minus the decap/expander ball, then sizing using the decap sizing ball. Next I do a final length trim and chamfer. I have a drill chucked 300 blk trimmer from a convenient online store...I'm sure you've seen their trucks. The trimmer is kind of crude but it stays on measurement. I have since acquired a large coffee can of factory once fired brass. I keep the factory brass separate from my formed brass but they all work great. It is a terrible cartridge though. I've gone from light to heavy bullets and cannot decide if I like it enough to keep shooting it. I did just finish 5 weeks of complete prepping, including trimming, 6K once fired 5.56 cases on a Frankfort Arsenal Platinum case prep station and that experience makes the Mark 7 trimmer look very exciting. The FA case prep center is okay for small batches but 30-40 cases an hour just to trim and chamfer is awful.

great vid! lets see this on a lee 6000!

i just converted 2k 223 into 300BO with the mini saw and jig and then resized to trimmed to length on my Lyman xpress trimmer....

What an improvement ovrer my old RCBS automated trimmer

Nice setup

It's no Henderson or Giraud.

I’m a poor and use a 3d printed jig in a harbor freight 2 inch chop saw. Hornady duo prep chamfering tool. Then hornady sizing dies. Then hornady trimmer with power adapter for duo prep. It’s a pain in the ass but it’s cheaper than buying off the shelf brass.

I’m converting 8.6 BO and 300 HAM’R on my 750 w/ an auto drive and would love to see a review, especially will case feed speeds and torque settings.

Gavin, i can't find lyman holder head x 26 extended trimming listed online for sale....do you have the part number?

I think the issues with case wall thickness would eliminate the value of this on a progressive, unless your .223 brass is sorted.

I like the motor, but I think the cutters the Dillon uses are far more durable. The Lyman trim dies are solid though and are cheaper than the Dillons.

Looks like cases still need chamfering and deburring? When you spin the cases on the knifes of the caliper, it the cut SQUARE?

Will it fit a LEE APP ?

Seen a lot lot of bad reviews on this trimmer does anyone have anything good to say about

Midway currently lists this as "discontinued." 🤔

I'm looking into getting into reloading here soon and the frankford arsenal is something I'm looking at given the bang for the buck their 10 stage progressive gives. I'm mainly wanting to do 300blk subs so this might be something I want in the future since it's way easier to pick up tons of 5.56. Picking up my 300blk cases doesn't always work if I use it in 2 gun since they aren't gonna pause the match for me so I wanna convert the cases that I can just pick up buckets of at the 200yd range. Hope you test this thing out on a progressive soon, I'd love to see how it would do on a 10 stage press taking crimped once fired 5.56 all the way to a complete 300blk.

Is this setup Available for 6BR/30BR etc

Does it debur or chamfer and if not what would be the most efficient way to do that.

Nice piece of equipment but it looks spendy for my needs. I'll look it up.

I can’t find this for sale anywhere as a kit or separately

For $400, you can just go buy a lifetime supply of brand new 300 blk brass.

Counterproductive without a 3 way cutter. It's plenty quick in trimming, but at the price for what it does, no thanks.

Can you use this for normal trimming and deburring similar to a Gerard or Henderson

what about the deburring

$325 and $50 PER caliber.

I bought an ebay version of the rt1500. Best money I had spent.

Nice trimmer and good overview video. I bit of an missed teaching opportunity when setting the trim length. You should always set trim length based on a SAAMI spec print, not grabbing a random piece of brass that is sitting around.

If you put it on a progressive press....you'd not get the chance to chamfer? Trimming is a hassle when converting brass..ie..223 to 222...a trim die and file would be the cheaper way.. Interesting tool Add a 3 in 1 tool head..trim, inner chamfer, outer chamfer..and you'd be laughing.