243 Peterson Brass Vs WIN Brass Case Capacity H20

[DoneNOut]

WIN:
Grain Weight empty 3 case ave: 163.4gr. H20 Case weight 219.6gr. 56.2gr H2O capacity.

Peterson:
Grain weight empty 3 case ave: 173.5. H20 case weight 227.4gr. 53.9gr H2O capacity.

 

[Stammster]

That doesn't surprise me. Other than Hornady, Winchester has the highest case capacity of anything I've loaded for. Peterson usually has low case capacity. ADG has the lowest case capacity per cartridge - so much so it can cause serious overpressure problems even when starting 10% below book max.

 

[can1010]

that's about right my Hornady 55.6 and Peterson 53.6. But the Peterson will hold a lot more pressure. put 2-3 warm to hot loads in Hornady and they loosen primers but run the some velocities in Peterson and it laughs and keeps going

 

[GLTaylor]

Also, Peterson and ADG will achieve desired velocity with less powder - in addition to being tough.

 

[can1010]

I also like the made in the USA. when it comes time to buy top quality I have been staying with Peterson as long as they make it

 

[DJ Fergus]

That doesn't surprise me. Other than Hornady, Winchester has the highest case capacity of anything I've loaded for. Peterson usually has low case capacity. ADG has the lowest case capacity per cartridge - so much so it can cause serious overpressure problems even when starting 10% below book max.

I know that ADG even says their brass has lower capacity but my ADG 6.5 saum brass has about 2 grains more h2o capacity than the nosler brass I was using.

 

[Tiny Tim]

Peterson brass comes with a warning concerning case capacity and reloading practices due to case volume issues.

 

[Tripodmvr7]

Peterson brass comes with a warning concerning case capacity and reloading practices due to case volume issues.

Kudos to them. Rookie reloaders easily make mistakes with that issue. Our local PMP cases suffer the same fate. They are however strong in construction but not very consistent.

 

[DoneNOut]

So if there is a 3gr weight H2O difference does one go down 3gr powder weight? Stupid question, but oh well.

 

[can1010]

So if there is a 3gr weight H2O difference does one go down 3gr powder weight? Stupid question, but oh well.

NO it is not a one to one ratio, go down 10% and start over. in the end you might actually match or pass the charge of other brass it all depends on brass quality

 

[Tiny Tim]

If starting from scratch, start 10%below minimum listed charge weight. Experience may teach you some short cuts later. Even if this requires a couple hundred grains of powder, a few bullets and primers, it's far less expensive than a trip to the gunsmith or worse yet, the hospital.

 

[GLTaylor]

In the 3 or so cartridges I load these in, final charge was 1-2.5 grs lower for same speed (284, RUM, etc)

 

[dug]

Runnin norma lg pri and peterson sm pri brass in my 260 gas gun
norma powder charge is 42 grs
peterson powder charge is 41.7 grs same grp size same point of impact. but 25 fps slower in peterson brass.
in a bolt rifle you could bump up the powder in peterson and get fps back but gasgun pressure curves are alot different and u really need to "read" ur brass to stay inside the limits and brass life .
on bigger cases im sure the grain differences will be greater

 

[DoneNOut]

I was also thinking about using a slightly faster powder due to volume decrease.