Problem with Mec 600 JR
 

So I finally got started trying to load some shells for my 16 gauge Parker. I have 3 old Mec 600 JR's, a 12, a 20, and now a 16. The 12 and 20 are straight from the factory years ago, and have always loaded perfectly.

The 16 I bought recently off EBay. It looks fine, but I am running into some major problems with crimping. This is on new cheddite 2 3/4 shells, dr 16 wads, 7/8 Oz of shot, and 16.3 grains of International.

I have tried adjusting according to Mec's instructions, but I am unable to get the crimp to close fully without crushing the case. It is as if the crimping ram inside the final crimper will not go down onto the middle of the crimp. I have tried dumping out a little shot just to see if the shell is overloaded, but that isn't the problem.

When I run my 20 gauge loader, one with the old steel crimper, when you get nearly to the bottom, the cam sort of releases the ram so that the body of the crimper moves up, allowing the ram to press into the center of the crimp causing a flat crimp with a little rim. On this 16, that does not happen no matter how I adjust the hieght, or the cam - weird. The Body simply can't slip upward to allow the ram to go down that extra 1/4 inch or so. This machine is a pre 82, but has the newer plastic pre crimp and crimp stations.

Anyway, I'm not sure this will make sense without seeing it. I just thought I would see if anyone had ever run into something similar.

Thanks,

John Clement

The more I look at this thing, what I notice is that the point of the cam never moves behind the cam roller allowing the crimper to rise and the plunger to plunge. It is physically impossible for it to do so. Is suspect that either the cam, or more likely the crimper is from some other model.

MEC reloaders are great.

You can order any replacement part you need directly from MEC so you should be able to get the right crimper for your 600jr. Just be sure to order the part for the correct vintage 600jr as they have three models; pre '82, '82-'85 and the current Mark 5.

http://www.mecreloaders.com/ProductLine/Product.asp

Call MEC and talk to them. They have always been great to talk to and they should be able to diagnose your problem and guide you through the fix.

have you tried differant brand of hulls...i have a mec. junior 12 ga and some hulls it does not like....charlie

John, When you say the cam doesn't engage it sounds like the same problem I had with a 600 .410 when I tried to convert it from 2 1/2" to 3". And being that you got it on ebay, you don't know how it was previously used. The cam crimp assembly has the cam roller and a pin with two positions for the pin and roller. try driving out the pin and reinserting it in the other position. For whatever reason, this made all the difference on mine.

Dave

Thanks everybody. It was a no brained, but I had no brain so... The whole loader was set up a half inch too low. In going over everything with MEC, it became evident that it was set for a 2 1/4 inch shell - never even heard of that. As soon as I raised it, and reset the cam and plunger, it worked perfectly. So I finally have some new low recoil shells loaded - too bad it's going to snow for a week now.

Thanks again for all the suggestions.

Kent, yes, exactly. It was bolted in the bottom hole of the red stand, which is correct, but the top hole on the black column instead of the bottom one. This made it a full half inch too short. I had not even thought of that, because I always shoot 2 3/4, so have never readjusted the height of my loaders. As you can imagine, it makes a significant difference. This is exactly what it felt like, but I never thought that it might be the actual problem.

Oh well, it works now.