Primers in fired brass

[RashQuestion]

+1 on Well Guided Bullet Blog? Where? Thanks!

 

[243winxb]

223 brass rmr 55gr fmjbt and 24grs varget

52,000 CUP is 223 maximum working pressure. Most if not all, Varget maximum loads Hodgdon has listed are compressed. This tells me its a poor choice of powder for maximum loads/pressure.

Then the rmr 55gr fmjbt has very little bearing surface. This reduces pressure. Add in the cartridge slop in the Savage chamber & you have brass that is not fully expanding to the chamber, or extra head clearance.

Primers can back out.

I would change to a faster burn rate ball powder for the 55 gr bullet. No compressed loads. The pressure would be more normal and expand the brass on firing.

I use IMR 4198 for 55 gr plinking loads, but it doesnt work well in powder measures ,like ball powder.

 

[AJC1]

52,000 CUP is 223 maximum working pressure. Most if not all, Varget maximum loads Hodgdon has listed are compressed. This tells me its a poor choice of powder for maximum loads/pressure.

Then the rmr 55gr fmjbt has very little bearing surface. This reduces pressure. Add in the cartridge slop in the Savage chamber & you have brass that is not fully expanding to the chamber, or extra head clearance.

Primers can back out.

I would change to a faster burn rate ball powder for the 55 gr bullet. No compressed loads. The pressure would be more normal and expand the brass on firing.

I use IMR 4198 for 55 gr plinking loads, but it doesnt work well in powder measures ,like ball powder.

View attachment 1025939

Maybe he doesn't know how fond of tac some of us are.

 

[243winxb]

The OAL can be longer for a bolt action. This will help the compressed load problem.

In the AR15, rounds must fit the magazine, unless you want to single load each round. A Bob Sled can be used to single load long heavy bullets.

 

[GeoDudeFlorida]

The OAL can be longer for a bolt action.

Maybe. My Ruger American .223Rem uses the rotary magazine - I prefer it over the long, dangly, constantly-in-the-way AR-style mags in a bolt gun - and is typically Ruger about OAL . IOW" it doesn't like longer than SAAMI spec and it doesn't like single-feeding. For a cheap, no-frills rifle it shoots pretty good and if it gets left out in the weather I'm not heartbroken.

Traditional Mauser-type actions typically react badly to single-feeding, also. The rim has to slip up under the extractor. You can snap an extractor or bung up a case rim turning the bolt down on a chambered round. Depends on the bolt and extractor, of course.

 

[Slamfire]

+1 on Well Guided Bullet Blog? Where? Thanks!

For whatever reason, the Blog is gone. However, Professor Jim Boatwright's writings can be found, such as

https://www.scribd.com/document/180844647/The-Well-Guided-Bullet-PartI

https://www.scribd.com/document/180844653/The-Well-Guided-Bullet-PartII

https://www.longrangehunting.com/threads/bullet-obturation-jim-boatright.212199/

Copy and save before they are totally gone!

 

[hnusz]

Picked up a case gauge yesterday it's a hornady. Sized cases and loaded ammo checks good . Now to decide weather to buy a go no go gauge set and try to set the headspace myself or find a gunsmith to do it .

 

[243winxb]

I would try some factory ammo

+1

Fire some factory ammo.

New guns with problems get sent back to the manufacturer.

 

[hnusz]

It's not a brand new rifle. It's just new to me.

 

[hnusz]

Got two factory rounds fired them today no proud primers

 

[twarr1]

Got two factory rounds fired them today no proud primers View attachment 1037006

…which supports the suggestion you’re setting the shoulders back too far for the bolt gun.

 

[hnusz]

My reload's and the factory rounds I shot all fall between minimum and maximum on a hornady case gauge. My reload's had proud primers the factory rounds did not. Both were 55gr fmjbt. The only difference was the powder charge. Don't understand how my reload's could have the shoulders set back to far when both rounds are between minimum and maximum in the case gauge? Did not use a depth mic to see how far under maximum or over minimum each measured. As long as they fall between minimum and maximum should they not be sized properly?

 

[tightgroup tiger]

As long as they fall between minimum and maximum should they not be sized properly?

Maybe I've been handloading to long but my chamber is the only case gauge I use.
Min and Max case gauge checks cases for the functionality and your ammunition did function.
But now you need to make it fit your rifle and if you can't because the chamber is to long then the rifle needs to make a trip to the gunsmith.

 

[Seedy Character]

My Rem 700 .223 does NOT like Varget.
I am not a fan of compressed loads, either.

Change powders, check your sizing dies, shoulder set back and see if the problem is done.

I keep my AR and bolt ammo seperated, though. That's just me. Most all my loads are taylored to A gun.