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MEC 's new Single stage Press


survivalshop

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 MEC getting into Metallic Reloading with a new single stage press

Press Assembly 
by MEC RELOADING


MEC has introduced the new Marksman single stage metallic reloading press for 2017. This heavy duty cast iron press features a patent pending self-centering shell holder base that centers every cartridge. It also features a smooth ram for accuracy each round you load. Standard 7/8-14 threaded dies from all major reloading manufacturers are compatible. This sturdy press also features a wide enough clearance to load calibers from 22 Hornet all the way up to 416 Rigby. Best of all, the Marksman Press is made in the USA!

Weight: 16lbs

 

MEC.jpgmec shell holder.jpgmec shell holder2.jpgmec case .jpg

 

 

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 I just ordered one for myself for Christmas , $ 188 shipped to my door. Don't even know how old my Pacific Press is , I bought it from an much older friend of mine , when I first got into reloading & who knows how long he had it . Its starting to get more play in it then I like .

 I give a review when I set it up . I see they also put out some accessories for it & it seems by the other products they now have available , they are into Metallic reloading.

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Got a chance to do a little testing with my new MEC single stage Press last night & it warrants more testing & curiosity . 

Had to remove my RCBS Bullet sizer to make room for it .

DSCN2788.JPGDSCN2787.JPG

 

 I took two Match , once fired 308 Brass & lubed them . I had a brand new never used # 3 RCBS Shell Holder to use for this test & used the same Die , a Redding Bushing Die , & found out real quick , there is no Cam over with this MEC Press , none , it stops when the Shell holder contacts the Die period . One other note , the Shell hold is loose on the Ram , it moves around I would say an 1/8 " in any direction, kinda weird .

 I measured two Cases , # 1 was 2.004" & # 2 was 2.0035" , sized # 1 in the MEC & it came out to 2.0045" , moved the Shell Holder & Die to the old Pacific Press & I know I can Cam over with this one , but did not , Set the Die to so as the Ram stoped when all play was out of the system ( My Press handles stop a the Benches bottom desk top ) Put #2 case in & sized it , came out to 2.008" , needless to say I was perplexed & said , this can't be , there has to be something I did , so I took the full length sized # 1 case & sized it in the Pacific press & it measured afterward to 2.008" , so it went from 2.0045" to 2.008" just by changing presses which are set up the same , why ? Why would it make a difference , if both Sizing Dies are set the same & the only real difference is the Press & that doesn't make sense to me , yet !

 I have to do more testing, that is for sure .  

DSCN2789.JPG

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27 minutes ago, survivalshop said:

 Is is possible that the Floating Shell holder has something to do with it ?   
 I have read where a floating Shell holder would let the Cartridge case align better in the Die . I think there is a Thread on that here , that I posted from MidSouth news letter .

That article is what came to my mind when you mentioned how much movement the shell holder had. Never would have guessed it could make that much difference though.

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  I guess it is possible that the Cartridge case being skewered to one side or the other could make a difference in sizing . I know that if I use my SB sizing Die , the sized case will grow because you are sizing deeper on the case , but when the Shell Holder is contacting the Die Base , that should produce the same results , the Die is the same , same Shell Holder , the only thing thats different is the Press , even so , its the same equation , Shell Holder contacting the Sizer Die Base , dimensions should come out the same . 

  Saying that the only thing that is changed is the Floating Shell Holder , unless I'm missing something .  I can see if I used different Shell Holders or Sizer Dies , but didn't . This makes me wonder have loaded ammo will perform from this Press , can't see a Velocity change ,because the case volume isn't going to change by how the Case is sized , then again , if the Case is being sized & you have to trim it & take brass mass away , that had to come from somewhere & that may indeed change Case Volume .

 If the Sized case holds to the over all case length from sized case from this MEC set up , I will not have to trim any cases or trim far less . My tolerances for sizing are 2.0045" to 2.0055" , that is what I load , if less I don't use them for anything but blasting ammo for testing & if more then they get trimmed .

 This is going to be fun , testing using this press , I have to copy some of the loads I have already test , jut to see if there is a difference in some way . If anything , Case life should be lengthened if this sizing dimensions hold true .

Edited by survivalshop
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 I resized two once fired LC Brass , probably shot from a Belt fed , they were stretched pretty good already  , the difference was around 0.003" less stretch with the MEC on those also . Close to what the Match brass was .

 I

13 hours ago, planeflyer21 said:

 I'd be surprised if it changed the case volume by 1/2 grain of water.

Probably not even that & I really don't see it making any difference , except on Brass life span.

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  • 2 weeks later...

  Sized a bunch of 308 brass today , half once fired Match ( thanks Drew ) & some once fired commercial & about ten once fired LC ( probably from a Belt fed ? ) I noticed one thing right when I got to the LC , that I hadn't tightened the Press handle lock nut sufficiently , it loosened up first LC I tried to size . If you look at the Handle , it kicks off to one side or the other , which ever way you want to index it . I tightened the nut up again & had no further issues with it for the rest of the sizing process  .  

   It sure is strange inserting the case in that floating Shell Holder , not used to the thing moving around , but seems to work pretty good . I have not figured out how to see exactly why the two presses size the cases differently , its so consistent in how one stretches the Case more & at the same time is really not much . Kinda reminds me of the difference in what a Small Base Sizing Die does in comparison to a Full Length Sizing Die . Except here its the same Die & Shell Holder & press set up , just different Presses , maybe it just because the MEC is new ? . 

   I will be comparing loads between the two presses , not that I think there will be anything thats going to jump out at me , but ya never know . I can tell you this , I like this Press so far .

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2 minutes ago, planeflyer21 said:

I wonder if the floating case holder sort of "wiggles" the case out of the sizing die, as opposed to brute "yanking" of a fixed holder, allowing the brass to stay put instead of flowing.

Or it allows the Case to stay aligned during the Sizing process , maybe an locked in case stretches differently . Hard to tell & Maybe I will make a set up to test for Case concentricity, I'm not going to purchase one for a couple Cases , I have Dial indicators & bases & can use one of the other Case Trimmers I have . 

 I do know this , them LC stretch a bunch , compared to the Match & commercial , nothing any of us didn't know already .

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  • 2 weeks later...

 I removed the spring clip that holds the Shell holder in my Pacific Press & replaced it with an O-ring , as was in an article I posted a while back & man did it give that Shell Holder some play , about the same as the MEC Press . I have some photo's , but will include them in a new Thread with the outcome of the comparison between the two Presses to see if the loose type Shell holder , is why the Cases stretched less .

Edited by survivalshop
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Hell yah I want a mini 12ga gun. I'm going to get one of the 3gunners long tubes and fill it with about 20 to 24 of those little bastards and bump fire the $hit out of a 930 Mossberg ! The little metal piece is like $14 shipped. Or maybe do it to a Mossberg 500 Chainsaw !

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5 hours ago, MikedaddyH said:

Hell yah I want a mini 12ga gun. I'm going to get one of the 3gunners long tubes and fill it with about 20 to 24 of those little bastards and bump fire the $hit out of a 930 Mossberg ! The little metal piece is like $14 shipped. Or maybe do it to a Mossberg 500 Chainsaw !

Get the 930 Jerry Miculek special!  24" barrel and the mag extension on some stick out an extra 1 1/2"!

 

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Interesting results with my experiment , here's what I did. As per above Post , I removed the spring clip that held the Shell Holder in a locked position in the Pacific Press & replaced it with an O-Ring . 

 Took three LC 308 Brass cases , three of each , 2006,2010& 2011, measured each one ( there were some differences in the Unsized case years )& marked the bottom of the case with I, II & III , sized the # I's in the MEC press & the # II's in the Pacific Press , (now with the Shell holder loose to move a little ).

 Now ,No measurable difference in size length from one press to the other , this is with the same Bushing Sizing Die & same Shell holder . I took the sized cases from the MEC press & re-sized them in the Pacific Press & this time , no case got longer !

 Theory ; the locked in Shell holder some how , by locking the case in the Press ram , it must not be aligned with the Sizing Die & sizes the case differently , by around 0.003" , on my testing anyway, on the comparison Pacific Press I have . Now it may not be much , but two things come to mind , one - if its sizing differently , how ? At an angle & two- Brass life has to be longer if its not being stretched by sizing it needlessly by misalignment . That brings up something else , if it is misaligned , in what way & does it effect how it sits in the Chamber , is the case deformed enough to cause the Bullet to be angled in such a way as to no hit the Lands or Forcing cone or Lead dead center ?

  I was going to use a larger test count , but after this , I don't think it will make a difference . That article about getting rid of the locked in Shell Holder was dead on , I can't believe just having slop in the Shell holder would have made any difference .

Edited by survivalshop
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