jamming problems with reloaded ammo

[mio]

my brother in law has been reloading 9mm ammo for a while its good stuff a have a couple boxes he made up for me and it cycles flawlessly and groups well out of my highpoint carbine and my buddys keltec pistol. so when he got a 12ga reloader for xmas i was looking foreward to getting some cheap ammo that shoots well.

he gave me a box of 2 3/4in high brass 12ga to pattern. its labeled #6 1 1/8 29gr 700x i took it to the gravel pit on thursday and wow. first time ive ever seen my 870 jam. right from the beggining. i put in two rounds racked it and they jammed, worked them out tried again and got one in the chamber added a shell and shot racked jammed!

visably looking at the shells i cant see anything wrong with them. the shot load is slightly ligher than the factory boxes i have (they have 1 1/4oz) do you guys have any ideas why this stuff wouldnt cycle?

 

[MARKMALL]

Your shells are way over presure! 700x should not use more than 19 grains ,depending on components.

 

[mio]

thx markmall i wont stick them in my single shot as planned. that shouldnt affect the shells jamming as described though should it? just as a thought though the gun only has 2 3/4in chamber could too much powder be causing a length issue and resulting in jamming?

 

[243winxb]

29gr is to much powder. What loader brand? What gun? Rack a pump i guess? A Mec loader when adjusted correctly, will taper & crimp reloads to look/feed same as factory. Loading data must be followed exactly.

 

[rg1]

DON"T shoot any more of the shotshell loads!!! Something is wrong especially if your 12 gauge 1 1/8 ounce loads have 29 grains of 700X. The maximum for 700X should be 19 to 20.5 grains MAXIMUM. You're going to get a Rem 870 explosion in your face!!!! There is a mistake in the loading data.

 

[mio]

k i wont be shooting anymore of them knowing they are overloaded. think ill just give them back to him tell them they are overloaded (he wont believe me) and decline any future ammo from him.

 

[amlevin]

Also, tell your BIL to make sure the sizing/depriming die is adjusted properly. On a MEC, it sizes the brass and the rim while it deprimes. I've seen way to many "FNG's with a MEC have the die screwed up to high and all it does is push out the primer. The rim has to be properly sized or the bolt won't go fully to battery in a pump/autoloader. On a break action one will have to slam it shut to get the round fully chambered.

He needs to make sure that the die is adjusted so it touches the shell holder when the handle is pulled down. Makes the press a little harder to work but the only other alternative is to get the separate "collet resizer" that MEC sells. Size the base/rim as a separate action then load.

Just a possibility as well as being overloaded.

 

[Bovice]

Are you sure you know there are 29 grains of powder in it? Don't go pointing fingers just yet. Pull it apart and measure it yourself.

Then, if it's too hot, tell him. He might go out and use it and not be so lucky. You can also tell him you had trouble chambering the shells. Don't just refuse any future ammo from him if you have good function and accuracy from all the ammo he made for you in the past. Factory ammo is much more expensive than your average reload, and I think you'll regret it.