Pics would help.
Have you compared manuals?
Or online resource databases?
Actually there is a 444 load data section here.

 

All I can say is mine doesn't do that.





Vooch

Sent from my Pixel using Tapatalk

 

Nor mine

 

Compared loads from several different sources. Nothing crazy about the charge. Not seeing any cutting on the inside of the case. On the positive every load shot under 1 3/8@ 100. Zeroed at 175 with 46gr my uncles 240gr Speer load was dead on @100. Handy if I ever need to borrow shells.

 

If you're talking about the "case head" bulge, yes, to one degree or another, that is normal...for three reasons:

1. The case head is partially unsupported, and..........

2. The Marlin lever action rifle and some other designs with a rear bolt lockup have a condition called "active" and "passive" headspace. Passive headspace is the static headspace as it is set at the factory, and active headspace is headspace that is created when the cartridge is fired and the pressure (bolt thrust), it allows the rear lockup of the bolt/bolt block to give a little allowing the cartridge to slip rearward... but don't be alarmed, the rearward movement is infinitesimal.

3. Chamber dimensions of the individual rifle.

With safe loads within the pressure parameters of the Marlin action, this condition is normal and nothing that I have found to be concerned about. Also, my rifle exhibits the same characteristics with starting loads as well as top end loads.

Here are three fired cartridges from my rifle that you can compare to.

 

If your talking about the "case head" bulge, yes, to one degree or another, that is normal...for three reasons:

1.the case head is partially unsupported, and..........

2. The Marlin lever action rifle and some other designs with a rear bolt lock up have a condition called "active" and "passive" headspace. Passive headspace is the static headspace as it is set at the factory, and active headspace is headspace that is created when the cartridge is fired and the pressure (bolt thrust) allows the rear lock up of the bolt/bolt block to give a little allowing the cartridge to slip rearward...but dont be alarmed, the rear ward movement is infinitesimal.

3. Chamber dimensions of the individual rifle.

With safe loads within the pressure parameters of the Marlin action this condition is normal and nothing that I have found to be concerned about. Also, my rifle exhibits the same characteristics with starting loads as well as top end loads.

Here are three fired cartridges from my rifle that you can compare to.

Thanks for the response! I also think my Lee resizing may be a little tight...Exaggerating the look of a bulge. I shoot 40cal in USPSA And the cases fired through factory Glock barrels have a serious bulge due to the unsupported chamber. I was wondering if Marlins were somewhat similar.

 

Hope so! It shoots really well.

 

Due to the rear lock up of the action and associated bolt thrust, in order to maximize case life, and reduce case bulge to a minimum, it is a good idea after cleaning the rifle, before shooting the rifle, run some dry patches thru the chamber area to get any oil out, the presence of oil/lube does in part prevent the fired expanding case to from getting maximum grip on the chamber walls (case sliping back on oil/lube) thus adding to bolt thrust. By the same token, after re-sizing be sure to wipe off any lube..

 

It is normal-chamber is cut a little off.No problems will result, shoot it.-Locoman

 

I have a 86 MG and a "P" they both show the same. It is not a problem with normal pressures.