9mm & Vihtavuori N330

tbeb · March 24, 2009, 08:45 AM

Does any book show 5.6 grains of Vihtavuori N330 for a 9mm 115 gr. JHP?

Jim Watson · March 24, 2009, 09:10 AM

Vihtavuori's maximum load is 5.4 gr N330 with a 115 gr 9mm.
I do not have anything that shows a heavier load.

Shoney · March 24, 2009, 04:16 PM

Jim is correct!

You can go to this site and click the Reloading Data at left, and download their entire load manual:
http://www.lapua.com/index.php?id=851

Jim Watson · March 24, 2009, 04:20 PM

Yes, but I suspect the OP is "shopping" for a source of a heavier load than Vihtavouri gives. Maybe trying to justify an old pal or internet recommendation in excess of Vv data.

There might be a loading manual somewhere that was developed with a little sloppier chamber or a different lot of powder that would let him bust the company recommendations. Different sources commonly differ in top loads and a lot of people look for the heaviest of all with little thought of why it might be the heaviest.

tbeb · March 24, 2009, 10:01 PM

Here's what going on. I've reloaded for a long-g-g time. I don't do 9mm. I don't have 9mm dies. I'm a little older now and I don't enjoy looking for my ejected cases on the floor at an indoor range, especially when it's crowded. I bought reloads on gunbroker.com. Seller told me powder charge was 5.2-5.4 of N330 and I was okay with that since 2006 Vihtavuori Reloading Data shows 5.4 max. When I received ammo, 50 rds. were labeled 5.6 grs. of N330. I spoke with seller and he said he would give me a refund if I shipped that box back to him. Anyhow, I'm trying to find out if 5.6 would be safe to fire in my CZ75B.

D. Manley · March 24, 2009, 10:51 PM

Quote:

Here's what going on. I've reloaded for a long-g-g time. I don't do 9mm. I don't have 9mm dies. I'm a little older now and I don't enjoy looking for my ejected cases on the floor at an indoor range, especially when it's crowded. I bought reloads on gunbroker.com. Seller told me powder charge was 5.2-5.4 of N330 and I was okay with that since 2006 Vihtavuori Reloading Data shows 5.4 max. When I received ammo, 50 rds. were labeled 5.6 grs. of N330. I spoke with seller and he said he would give me a refund if I shipped that box back to him. Anyhow, I'm trying to find out if 5.6 would be safe to fire in my CZ75B.

N-330 is hands-down my favorite powder with 115 JHP bullets in 9MM. My accuracy loads are 4.8 / 5.0 grains depending, on the particular brand of bullet. Current VV data shows 5.4 as Max load but Hornady goes to 5.5 for a 115 XTP. Although it's a hot load, I doubt the additional .2 grains puts it into truly dangerous territory. N-330 is a moderately fast powder falling between N-320 and N-340...not too far from AA#5, PB or Unique but I've not seen evidence of it being prone to pressure spike.

All that said, I'm a little skeptical of the whole deal. I find it just a little odd that someone is selling reloads using (any) VV powder considering, the price and especially, N-330 which is the hardest of all to find. The other thing that bothers me is if the seller is being honest about it, it smacks me as a bit irresponsible to be openly selling them loaded to beyond vetted data specs.

Jim Watson · March 24, 2009, 10:58 PM

Quote:

I bought reloads on gunbroker.com.

Ah-HA!
I don't do that. I am also too arthritic to scrounge brass except under ideal conditions - solo practice on my local club range, but I just order 9mm by the flatrate box and motor on. At an IDPA match or other congested or strange range, it is just "pop and drop."

Lessee, now. 5.6-5.4 = 0.2 = 3.1%
According to Vv's own tests, which parallel the old Hutton-Forster-Forker rules of thumb, 3.1% more powder will yield 6.2% more chamber pressure and 2.4% more velocity. That is about 2200 psi, which might get lost in the noise level between two lots of powder.
So it isn't going to blow up your CZ.

K.W. · March 25, 2009, 11:19 AM

VihtaVuori 1992 115gr N-330 max 6,4gr 252 MPa Oal 2,8mm=1,1220914"
1995 115gr N-330 max 5,9gr
1999 115gr N-330 max 5,9gr
2000 115gr N-330 max 5,5gr
2002 115gr N-330 max 5,5gr
2006 115gr N-330 max 5,4gr
Edition 6 115gr N-330 max 5,4gr (Last paper, now internet only?)

March 24, 2009, 08:45 AM	#1
tbeb Senior Member Join Date: October 3, 2002 Location: Indiana Posts: 100	9mm & Vihtavuori N330 Does any book show 5.6 grains of Vihtavuori N330 for a 9mm 115 gr. JHP?

March 24, 2009, 04:16 PM	#3
Shoney Senior Member Join Date: February 21, 2002 Location: Transplanted from Montana Posts: 2,311	Jim is correct! You can go to this site and click the Reloading Data at left, and download their entire load manual: http://www.lapua.com/index.php?id=851 __________________ I pledge allegiance to the Flag - - -, and to the Republic for which it stands….Our Forefathers were brilliant for giving us a Republic, not a democracy! Do you know the difference??? and WHY?http://www.wallbuilders.com/LIBissue...les.asp?id=111

March 24, 2009, 09:10 AM	#2
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,544	Vihtavuori's maximum load is 5.4 gr N330 with a 115 gr 9mm. I do not have anything that shows a heavier load.

March 24, 2009, 04:20 PM	#4
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,544	Yes, but I suspect the OP is "shopping" for a source of a heavier load than Vihtavouri gives. Maybe trying to justify an old pal or internet recommendation in excess of Vv data. There might be a loading manual somewhere that was developed with a little sloppier chamber or a different lot of powder that would let him bust the company recommendations. Different sources commonly differ in top loads and a lot of people look for the heaviest of all with little thought of why it might be the heaviest.

March 24, 2009, 10:01 PM	#5
tbeb Senior Member Join Date: October 3, 2002 Location: Indiana Posts: 100	Here's what going on. I've reloaded for a long-g-g time. I don't do 9mm. I don't have 9mm dies. I'm a little older now and I don't enjoy looking for my ejected cases on the floor at an indoor range, especially when it's crowded. I bought reloads on gunbroker.com. Seller told me powder charge was 5.2-5.4 of N330 and I was okay with that since 2006 Vihtavuori Reloading Data shows 5.4 max. When I received ammo, 50 rds. were labeled 5.6 grs. of N330. I spoke with seller and he said he would give me a refund if I shipped that box back to him. Anyhow, I'm trying to find out if 5.6 would be safe to fire in my CZ75B.

March 25, 2009, 11:19 AM	#8
K.W. Member Join Date: April 16, 2008 Location: Finland Posts: 87	VihtaVuori 1992 115gr N-330 max 6,4gr 252 MPa Oal 2,8mm=1,1220914" 1995 115gr N-330 max 5,9gr 1999 115gr N-330 max 5,9gr 2000 115gr N-330 max 5,5gr 2002 115gr N-330 max 5,5gr 2006 115gr N-330 max 5,4gr Edition 6 115gr N-330 max 5,4gr (Last paper, now internet only?)