HI Guys,
Sorry for being a pain, but I saw a reply in here on another post & it is 124gr MG JHP 4.1gr N320 1.10 OAL.
I'm loading 125gr Topscore projectile 3.8 AP70N 1.12 OAL.
The question I have is what is the difference between 4.1gr N320 to 3.8gr AP70N ?
& remeber that I live in Australia.
cheers
Will
Confused
Started by
willthesaint
, Jul 18 2012 03:28 AM
4 replies to this topic
#2
Jeff Matzka
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Posted 18 July 2012 - 08:16 AM
HI Guys,
Sorry for being a pain, but I saw a reply in here on another post & it is 124gr MG JHP 4.1gr N320 1.10 OAL.
I'm loading 125gr Topscore projectile 3.8 AP70N 1.12 OAL.
The question I have is what is the difference between 4.1gr N320 to 3.8gr AP70N ?
& remeber that I live in Australia.
cheers
Will
I did a search for AP70N and found a store called Gun City in New Zealand - they describe AP70N as a "medium burning rate handgun powder and an effective slow/medium burning rate shotgun powder".
N320, by Vihtavuouri (Finland) is one of their faster burning powders, though not their fastest. I was hoping to find some sort of burn-rate chart that included powders of both manufacturers so you could compare the relative burn-rates of the two, but I came up empty. I did find some online comments that compare AP70N with Hodgdon Universal, which is similar in burn-rate to N330, which is a bit slower burning than N320. Hope this helps.
I use the N320 load you mention in your post, and it's a nice clean, soft-shooting load that makes minor power factor easily.
Edited by Jeff Matzka, 18 July 2012 - 08:25 AM.
"If you are finished, unload and show clear..."
#4
redbird1976
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Posted 19 July 2012 - 08:22 PM
Hodgdon has a burn rate chart on their website. I'm sure it's not inclusive of all powders, but it may help you out. Here's the link http://www.hodgdon.com/burn-rate.htmlk
I wanna go fast-- Ricky Bobby, Nascar Legend
#5
wanderer
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Posted 19 July 2012 - 09:38 PM
hi will
ap70 is slower burning than n320. n320 is simillar (maybe a tad slower) to ap50.
i load 3.7 ap50 with topscore (lead for those that dont know) at 1.12 for my cz. or 3.8 n320.
"The question I have is what is the difference between 4.1gr N320 to 3.8gr AP70N ?"
4.1 n320 with FMJ = comfortably makes power factor
4.1 n320 with lead = hot
3.8 ap70 with FMJ = never make power factor
3.8 ap70 with lead = be close, have you chrono'd that load, cant be much if anything over 1000fps.
ap70 is slower burning than n320. n320 is simillar (maybe a tad slower) to ap50.
i load 3.7 ap50 with topscore (lead for those that dont know) at 1.12 for my cz. or 3.8 n320.
"The question I have is what is the difference between 4.1gr N320 to 3.8gr AP70N ?"
4.1 n320 with FMJ = comfortably makes power factor
4.1 n320 with lead = hot
3.8 ap70 with FMJ = never make power factor
3.8 ap70 with lead = be close, have you chrono'd that load, cant be much if anything over 1000fps.
Edited by wanderer, 19 July 2012 - 09:54 PM.
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