22cal 50 TNT Jump or jam?

[urbanrifleman]

Anyone do a seating depth test for the 50 TNT?

 

[GrocMax]

They've been pretty forgiving on seat depth for me in a std for 223 SAAMI 2.5 degree leade angle. Probably the most consistently accurate budget varmint bullet out there, good terminal performance. .005", .010", .015" off go from there.

 

[urbanrifleman]

They've been pretty forgiving on seat depth for me in a std for 223 SAAMI 2.5 degree leade angle. Probably the most consistently accurate budget varmint bullet out there, good terminal performance. .005', .010", .015" off go from there.

I have been testing my 52 Fowlers and 55 Vamegeddons with 20 jam and they really seem to like it... But I admit I have not done a formal seating test. We just started jamming them hard for fire forming and man they really shoot.

 

[snert]

I jump mine 10 in the 222.

 

[K22]

Never understood the rationale for jamming a bullet into the lands especially for a hunting reload but then again I'm not an "expert".

 

[GrocMax]

Never understood the rationale for jamming a bullet into the lands especially for a hunting reload but then again I'm not an "expert".

The primer alone can generate enough gas/pressure to dislodge the bullet before main ignition takes place, in an inconsistent fashion, leading to accuracy issues (barrel timing). A jam can be more consistent in this regard. So can crimping the bullet. If it works and doesn't cause issues, go with it.

 

[urbanrifleman]

Fire forming.

And why not?

 

[urbanrifleman]

After checking seating depths in my chamber it appears I am going to have to jump them at least 20 thou. I think I will test loads at 25, I bet they shoot just fine. I bet they would shoot good at standard length. Certainly good enough for pdogs.

 

[searcher]

Sizeable jump - for sure.

 

[urbanrifleman]

First pass shows that more is better. I have loads made up to test out to 75 thou jump today but it started pouring on the way to the range .