Blown primer in .243 Ackley

[adam32]

So to obey our new lead free law I'm starting to load up ammo for my hunting rifles.

First up is my .243 Ack, my go to rifle that has always shot 105gr Berger's

I cleaned it real good with Shooters Choice like I always do. It's a Broughton 5c so it cleans up extremely easy.

I loaded 5 of the 95gr Barnes LRX with H4831SC.

I started at 46 then 47, 48, 49, 50 based on loads I found online and QL calcs.

First shot at 46gr the bolt barely opened and the primer was in the mag box!!!! Plugging the 46gr load into QL comes up with 45,248 psi...I know there's lots of variables with QL and I accounted for the ones I know. Even still, this load is low compared to everything I've found.

I went back and pulled the remaining bullets and weighed the powder charge, all were correct. It was also a new unopened jug of powder.

Any ideas????

 

[Edd]

Are you seating the bullets touching the lands?

 

[adam32]

No...I didn't measure them but I know they aren't there compared to how far I seat the Bergers out.

 

[Edd]

No...I didn't measure them but I know they aren't there compared to how far I seat the Bergers out.

Measure them and seat them about 1/16" off the lands. Guessing is a poor ammo loading practice.

 

[can1010]

if you didn't measure you don't know. check length to lands and start .050 off that has worked for the times I tried them. personaly I would switch to hammer bullets

 

[adam32]

if you didn't measure you don't know. check length to lands and start .050 off that has worked for the times I tried them. personaly I would switch to hammer bullets

Hammers don't have the BC I want for this rifle.

They are not touching the lands, I know that even without measuring...not my first time loading this rifle.

 

[adam32]

Measure them and seat them about 1/16" off the lands. Guessing is a poor ammo loading practice.

What would be the poor loading practice? I know they aren't at the lands, even if they were I don't see it being that much overpressure with a mild load???

 

[can1010]

primers in mag box is not a mild load. good luck with your load development.

 

[adam32]

primers in mag box is not a mild load. good luck with your load development.

I realize that...hence why I'm asking the question...and yes it's a mild load...it's actually a load a lot of guys run with a 105gr bullet.

 

[Edd]

What would be the poor loading practice? I know they aren't at the lands, even if they were I don't see it being that much overpressure with a mild load???

Loading ammo that deposits the primer in the magazine is a poor practice.

 

[adam32]

Loading ammo that deposits the primer in the magazine is a poor practice.

That's not helpful, at all.

 

[Mikecr]

Is this new brass (first fire-forming)?

 

[adam32]

Is this new brass (first fire-forming)?

2nd firing, first was a fireform load with an 87gr V-Max. Lapua brass.

 

[Edd]

That's not helpful, at all.

Without any real data and because of your eagerness to argue instead of providing any, I don't have the ability to and have lost the desire to help. So carry on.