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Reloading 2.5 inch with MEC 600jr

8K views 20 replies 13 participants last post by  Steve Y  
#1 ·
I've just bought a 12 gauge with 2.5 inch chambers. Can my Mec 600jr be adjusted to load two and a half inch cartridges? I don't have the owners manual anymore. If it can what do I have to do to adjust it? Can I cut a 1/4 inch off Winchester AA cases and load them as 2.5 inch cases? Two and a half inch cases are rather uncommon here, those that are sometimes available are imported from the UK and considerably more expensive than locally made 2 and 3/4 cased ammo. Also can you recommend what wads should I use. I want to shoot one ounce or 7/8 oz loads for rabbits and informal clays. Many thanks for any advice.
 
#2 ·
You can get and adaptor for your MEC it fits under the charging station, Crimp starter and Crimper. It is a 1/4" thick plate with all the right holes and cutouts, simple installation and works well.

For 7/8oz lead loads I use BP's Piston Skeet wad and PB powder. I usually buy 2.5" High Pheasant loads from B&P and reload the cases twice before they are shot. For my hunting loads I get the Rio short hulls, they are called 2.5 but they are actually 2 5/8" so I cut the 1/8" off and use BP's Short Wad, PB powder and ITX shot. I will probly just buy BP's economy hulls and cut a 1/4" off them.

None of my loads are listed anywhere but are based on given loads and I try to err on the light side. So far they are mild and effective.
 
#3 ·
I found the federal gold medal hulls to work well as short shells. I use the claybuster pink wad with 15 grns of 700x with 7/8 of shot. Been a great load for nearly everything!
 
#8 ·
Herb S. said:
Now THAT'S good thinking! That's the best adapter I've seen yet!!
Why are there holes in the base plate and not in the home made adapter? There must be a reason for them.
The holes are there for the live primer to center over,saftey.

Neat idea,I am just surprised the hull rim still fits into the guide.

Steve
 
#12 ·
Hey Guys,

Thanks for your help and especially AWS for the photo. I made up a spacer as per the MEC adaptor from a piece of .250 aluminium - with safety holes for the primers. I cut a quarter of an inch off some AA cases and primed them as usual with Win 209 primers. I loaded 20.5 grains of AS50 (that's Hodgdon International to you in America - it's made in Australia just in case you didn't know) and used a Winchester WAA12F114 wad with about 1/8 inch cut off the petals and an ounce of #6 shot. It crimped up beautifully and should be just the job. We're all set to hunt!
 
#14 ·
The 26 cent adapter works fine but it is slower and clumsier than the MEC adapter because you must center both the pre-crimp and final crimp by eye and feel.

The factory short kit is nice and is, to me, worth the extra money if you will use it much. I load about 1,000 2.5" 16 gauge shells a year on my Sizemaster so I'm glad that I spent the money on the MEC short kit.

The holes under the primers at the various stations are unnecessary - the penny is flat so how in the world can it set off a primer? The only reason that I prefer the MEC short kit is speed and convenience - pull the shell forward to a stop and it's centered for the pre-crimp - push it back to a stop and it's centered for the final crimp.
 
#17 ·
I believe you can just adjust from 3" to 2 3/4" by changing what holes are used in the main bar. There's a bolt in the back of the machine and there's a couple of holes in the frame as well as two holes in the bar. The guide plate also helps get a shell back out of the final crimp die if it gets a bit stuck. In the past I've used a piece of 1/4' plywood to make a spacer up in place of the Mec piece. I like that more than the spare change idea for speed.
 
#19 ·
I'm retired so time is no problem. You talk about time, try reloading BP and fiber wads then roll crimping. I've also gone to 2" shells by making the final crimp plunger thicker so it will stick down in far enough to get a crimp. You can also roll crimp on a Mec if the old crimp on the shell is removed and the smooth start crimp is used. Everything has to be just right - top of shot to top of shell and just enough start crimp for the plunger to grab.