Reloading PRVI Partizan .223

attila787 · January 27, 2010, 06:22 PM

Just received five hundred bullets of 62 grain Prvi Partizan bullets. What do you guys recommend my overall length should be?? I know not to go over 2.260, but I'm not sure what would be the most optimal.

Specifically these:

http://www.gunbroker.com/Auction/Vie...Item=154676282

Thanks

Bullet94 · January 28, 2010, 10:54 PM

What length (OAL) do your bullets measure?

Hammonje · January 29, 2010, 12:51 AM

M855 is 2.26" OAL.

I would set up me bullet seating die with my longer bullets at about 2.250 - 2.255". This keeps your rounds just below 2.26". Get them moving about 3050 FPS out of a 20" AR and 2900 out of a 16".

Good link to info on military ammunition:
http://www.inetres.com/gp/military/i...56mm_ammo.html

Bullet94 · January 29, 2010, 01:02 AM

Hammonje,
M855 has a steel penetrator the Prvi Partizan bullets attila787 bought
have a lead core. Don’t think that matters as long as he works up his loads.

That is a good link to info on military ammunition.

.

Hammonje · January 29, 2010, 11:39 AM

No, because the mass is the same. What does it matter if it is steel or lead if it weighs the same. There could be differences in the density within portions of the bullets, for example where the steel is located in the SS109 projectile. I don't think it matters as far as accuracy is concerned. If it does it would be small. It has a steel penetrator in the nose, but the rest is lead. I have some Prvi Partizan SS109 ammunition with the non-penetrator core and it is excellent ammunition.

Velocity of PPU 62gr Ammo: 20" AR-15

2981
2973
3002
3051
2997
3013
2991
2969
2991
3039
AVG = 3002.5 FPS

Just get them going up to M855 velocity (or rather a little bit lower). Little slower because 5.56 ammo is hot and we don't need to overwork our rifles. Right were I thought it should be.

Bullet94 · January 29, 2010, 09:49 PM

I have some Prvi Partizan SS109 bullets and wondered if there was a difference in bullet length between the lead core and the steel core?

**Unclenick** · January 29, 2010, 10:20 PM

Unless they leave a hollow space in the nose, there has to be a difference because steel is less dense than lead.

Hammonje,

Do you have any of that ammo left so you can tell Attila what COL PP was using with the bullet? That would give him a starting point.

Bullet94 · January 29, 2010, 10:54 PM

Unclenick

I thought the lead core bullets would be shorter. If someone could measure a lead core bullet I can measure a steel core and see what the difference is.

Hammonje · January 30, 2010, 02:27 AM

The OAL length of the PPU 62 gr ammunition is 2.215". Yes, I measured ten rounds and they all measured 2.215 +/- 0.003".

I know M855 projectiles are 0.906". You can measure the PPU 62 gr projectiles and compare.

January 27, 2010, 06:22 PM	#1
attila787 Senior Member Join Date: May 7, 2007 Posts: 259	Reloading PRVI Partizan .223 Just received five hundred bullets of 62 grain Prvi Partizan bullets. What do you guys recommend my overall length should be?? I know not to go over 2.260, but I'm not sure what would be the most optimal. Specifically these: http://www.gunbroker.com/Auction/Vie...Item=154676282 Thanks Last edited by attila787; January 27, 2010 at 06:29 PM.

January 28, 2010, 10:54 PM	#2
Bullet94 Senior Member Join Date: September 8, 2004 Location: Kansas Posts: 723	What length (OAL) do your bullets measure? __________________ PRO-SECOND AMENDMENT - Live Free or Die Last edited by Bullet94; January 28, 2010 at 11:09 PM.

January 29, 2010, 01:02 AM	#4
Bullet94 Senior Member Join Date: September 8, 2004 Location: Kansas Posts: 723	Hammonje, M855 has a steel penetrator the Prvi Partizan bullets attila787 bought have a lead core. Don’t think that matters as long as he works up his loads. That is a good link to info on military ammunition. . __________________ PRO-SECOND AMENDMENT - Live Free or Die Last edited by Bullet94; January 29, 2010 at 01:07 AM.

January 29, 2010, 09:49 PM	#6
Bullet94 Senior Member Join Date: September 8, 2004 Location: Kansas Posts: 723	I have some Prvi Partizan SS109 bullets and wondered if there was a difference in bullet length between the lead core and the steel core? __________________ PRO-SECOND AMENDMENT - Live Free or Die

January 29, 2010, 10:20 PM	#7
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	Unless they leave a hollow space in the nose, there has to be a difference because steel is less dense than lead. Hammonje, Do you have any of that ammo left so you can tell Attila what COL PP was using with the bullet? That would give him a starting point. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

January 29, 2010, 12:51 AM	#3
Hammonje Senior Member Join Date: January 11, 2010 Location: Lilburn, GA Posts: 117	M855 is 2.26" OAL. I would set up me bullet seating die with my longer bullets at about 2.250 - 2.255". This keeps your rounds just below 2.26". Get them moving about 3050 FPS out of a 20" AR and 2900 out of a 16". Good link to info on military ammunition: http://www.inetres.com/gp/military/i...56mm_ammo.html

January 29, 2010, 11:39 AM	#5
Hammonje Senior Member Join Date: January 11, 2010 Location: Lilburn, GA Posts: 117	No, because the mass is the same. What does it matter if it is steel or lead if it weighs the same. There could be differences in the density within portions of the bullets, for example where the steel is located in the SS109 projectile. I don't think it matters as far as accuracy is concerned. If it does it would be small. It has a steel penetrator in the nose, but the rest is lead. I have some Prvi Partizan SS109 ammunition with the non-penetrator core and it is excellent ammunition. Velocity of PPU 62gr Ammo: 20" AR-15 2981 2973 3002 3051 2997 3013 2991 2969 2991 3039 AVG = 3002.5 FPS Just get them going up to M855 velocity (or rather a little bit lower). Little slower because 5.56 ammo is hot and we don't need to overwork our rifles. Right were I thought it should be.

January 29, 2010, 10:54 PM	#8
Bullet94 Senior Member Join Date: September 8, 2004 Location: Kansas Posts: 723	Unclenick I thought the lead core bullets would be shorter. If someone could measure a lead core bullet I can measure a steel core and see what the difference is. __________________ PRO-SECOND AMENDMENT - Live Free or Die

January 30, 2010, 02:27 AM	#9
Hammonje Senior Member Join Date: January 11, 2010 Location: Lilburn, GA Posts: 117	The OAL length of the PPU 62 gr ammunition is 2.215". Yes, I measured ten rounds and they all measured 2.215 +/- 0.003". I know M855 projectiles are 0.906". You can measure the PPU 62 gr projectiles and compare.