Noslers harder jackets??

[Anonymous]

well I know the upper end lead is softer than the lower end.... so from what you just explained it would lean towards a harder jacket.

 

[Oldtrader3]

Not so! I just took time to explain it to you and you apparently do not undertstand still?

 

[Ridgerunner665]

Its not the jacket at all...its the cross section (the Partition).

Nosler jackets are gilding metal...a tad harder than pure copper, but not much harder...and I believe most other bullets also use gilding metal these days too. Swift still uses copper...

 

[Antelope_Sniper]

Partitions can be more picky then the ballistic tips. Sub 1 1/4" is usually easy, but breaking an inch may take a little more. But, find what they like and they can deliver great groups. The 60gr Partition is one of the most accurate bullets out of my .223, consistantly delivering 5/8" groups.

 

[Oldtrader3]

I have carefully, by weighing bullets and sorting into groups of 0.3 grain each, I have been able to get Partition bullets to shoot in the 1/2 to 7/8 inch at 100 yards consistantly to 300 yards on targets. I have done this in each of my (5) CF rifles. They are tuned to their respective Partitions and are ready to take any game at MOA accuracy to 300 yards. Don't sell short the Partition, I have been using them since 1963.

 

[JD338]

PT's normally run at higher pressures than standard cup and core bullets.

JD338

what other reason would cause this other than harder jackets? I've read in a few load manuals the the harder jackets cause higher pressures. I know as the charge increases and different primers and case volume, and bullet seating, tempterture....

oneshot,

The PT has a solid Partition the is compressed by the bore, creating higher pressure.
What you need to do is adjust for different COL's until you find what your rifle likes the best.
Start off .015" off the lands, magazine permitting, and keep seating deeper by .005" until you find the most accurate load.

The easiest way to get started is to take a fired case and slightly deform the mouth case so there is a slight friction fit. Seat the bullet be hand very long so that it will engage into the rifling. Carefully load into your rifle and let the bullet hit the lands and further seat the bullet into the case. Carefully remove it and measure the COL. Do this several time to ensure you have an accurate measurement.
Once you have this, seat the bullet .015" deeper into the case. Make sure you can feed this COL through the magazine and then shoot a 3 shot group.
Keep seating .005" deeper into the case and fire 3 shot groups until you get the level of accuracy you are looking for.

Hope this helps.

JD338

 

[Anonymous]

I'm aware of OAL...

but here's what Nosler rep says... I think that's what Oldtrader was trying to relay.... sorry man.

All bullets are currently using Gilding metal jackets (95%copper 5% zinc)except some solid copper bullets. The Partition bullets may cause slightly higher pressure in a tight barrel as the Partition in the bullet does not compress.

Its not the jacket at all...its the copper cross section (the Partition).

Nosler jackets are gilding metal...a tad harder than pure copper, but not much harder...and I believe most other bullets also use gilding metal these days too. Swift still uses copper...
Its not the jacket at all...its the copper cross section (the Partition).

Nosler jackets are gilding metal...a tad harder than pure copper, but not much harder...and I believe most other bullets also use gilding metal these days too. Swift still uses copper...

Ridgerunner and oldtrader are correct.