centershot
Silver $$ Contributor
Anyone know about this powder? I was able to secure about 9 pounds of this. Seems a bit faster than the other 4350 offerings. Thanks.
Accurate XMR 4350 Powder
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centershot
Silver $$ Contributor
Anyone else?
centershot
Silver $$ Contributor
I will use it in a .257 AI and a .280. So far has worked well in the .280 with 120 grain bullets.
FNSafari
Gold $$ Contributor
Accurate has a website with load data on it fyi. Should be pretty much in the IMR range. The Hodgdon burn rate chart lists A4350 slightly slower than IMR4350, but burn rates are related to case capacity so these charts are only a generalization. Since there is accurate load data online your best bet would be to use that and not try to interpolate. Good luck.
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AckleymanII
Gold $$ Contributor
I tried it in a 6.5x47 Lapua with 140's...holy cow...works really great!
XMR4350 was the name the former Accurate Arms company used on its Czech manufactured 4350-equivalent grade many, many years ago. Accurate Arms dropped the 'XMR' bit whilst still in business as an independent company and it was usually then referred to as 'AA-4350' in loading manuals and elsewhere. AFAIK 'XMR' has never been reapplied either by Accurate Arms or by the company that bought it and now uses the 'Accurate' name, Western Powders in Montana. (Western-era currently available Accurate-4350 does the same job but is a different product being sourced from General Dynamics Valleyfield in Quebec Province, Canada, the people who manufacture most IMR powders for Hodgdon.)
So, this makes it old, I'd reckon at least 15 years, more likely 20. XMR4350 was generally reckoned to be the slowest burner of the 4350 trio in its heyday. It is a fine performer though. If this is Czech manufactured, its nearest equivalent today in the US is Shooters World SW4350, also sourced from the same outfit in the Czech republic (like all SW powders), and data is available on the Shooters World website. That still doesn't necessarily make it the 100% same thing since Explosia a.s., the Czech manufacturer, has improved and upgraded its products over the years. My memory may be playing tricks on me (it often does these days!), but I'm pretty sure the original XMR4350 was very long grained, very like the US Manufactured DuPont IMR version back when I first used this powder 20 or more years ago, and the current SW4350 (Lovex SO-70 as we get it in Europe) has considerably shorter kernels.
So, this makes it old, I'd reckon at least 15 years, more likely 20. XMR4350 was generally reckoned to be the slowest burner of the 4350 trio in its heyday. It is a fine performer though. If this is Czech manufactured, its nearest equivalent today in the US is Shooters World SW4350, also sourced from the same outfit in the Czech republic (like all SW powders), and data is available on the Shooters World website. That still doesn't necessarily make it the 100% same thing since Explosia a.s., the Czech manufacturer, has improved and upgraded its products over the years. My memory may be playing tricks on me (it often does these days!), but I'm pretty sure the original XMR4350 was very long grained, very like the US Manufactured DuPont IMR version back when I first used this powder 20 or more years ago, and the current SW4350 (Lovex SO-70 as we get it in Europe) has considerably shorter kernels.
D-4297
Gold $$ Contributor
I've been using A-4350 in my Mosin - Nagant f-Open rifle for three years now , shooting 185 Juggs , 185 Hybrids , 200.20x , and 200 Hybrids . After extensively testing ALL of the 4350 powders in my rifle , I found that the A-4350 was faster than the others , by approx. 25 - 40 FPS , and showed less pressure issues with higher loads . Currently I have only three and a half pounds of it left , and wish it were still available . If you decide you aren't satisified with it , P.M. me , and we'll work something out .
D-4297
Gold $$ Contributor
@centershot . Just checked and see your in Tucson . I'm in N.W. side of Phoenix , and I know how to get there .
Depart123
You are misusing the term "faster". Whether a powder is "faster or slower" refers to burn rate, not velocity obtained in a particular load.
If you were getting more velocity with less pressure, then your powder was "slower" not "faster".
The AA4350 lot I have was made in the IMR plant (Canada) and burns closer to 4831 than 4350.
pdhntr
Silver $$ Contributor
If what you are asking about is XMR-4350, Laurie is spot on.
It is a powder that was available years ago, and long grain (as he said). He is also right about the burn rate being the slowest of the three. I have to wonder if something else is going on if you are finding it is faster. The chronograph and the target showed (back then) it was slower.
I shot a lot of that powder. Over 20 lbs in one year because it was cheap and worked in my prairie dog rifles.
Jim
I recently corresponded with Karen Gerard at Shooters World Powders and my idea of using my Accurate Arms #2 Manual published 2000 (before purchase by Western Powders circa 2004) with current Shooters World / Lovex powders, properly cross referencing, was given a big thumbs up and received a comment about if everyone applied that same thinking they would have had an easier time re-entering the US market WRT load data.
If you have questions about XMR-4350 I'd recommend contacting Shooters World personnel WRT applicable load data. That Accurate Arms #2 manual has a mix of loads developed and pressures measured in CUP as well as SAAMI PSI. The current Shooters World load data only shows load pressure data in SAAMI PSI, and the current (2019) Lovex load data available through the Shooters World website has pressures measured in CIP PSI. So be careful you don't get pressure references and units of measurement crossed up between those 3 sources. There's a digital copy of that Accurate Arms #2 manual out on the internet if that interests you.
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Everything I've seen so far indicates Shooters World SW4350 / Lovex S070 is the slowest of the 4350 powders, consistent with the other posts in this thread on that topic.
If you have questions about XMR-4350 I'd recommend contacting Shooters World personnel WRT applicable load data. That Accurate Arms #2 manual has a mix of loads developed and pressures measured in CUP as well as SAAMI PSI. The current Shooters World load data only shows load pressure data in SAAMI PSI, and the current (2019) Lovex load data available through the Shooters World website has pressures measured in CIP PSI. So be careful you don't get pressure references and units of measurement crossed up between those 3 sources. There's a digital copy of that Accurate Arms #2 manual out on the internet if that interests you.
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Everything I've seen so far indicates Shooters World SW4350 / Lovex S070 is the slowest of the 4350 powders, consistent with the other posts in this thread on that topic.
Re the current Czech (SW / Lovex) version, I tried it in 7mm-08 with the 160gn Sierra TMK last month as part of a test series looking at potential alternatives to the now banned in Europe H4350.
MVs were well, well down on both QuicklOAD predictions and load manual data. So much down that when I got home from the range I checked that I'd not inadvertently loaded the test batches with Lovex SO-71, the slowest extruded powder in the range (the one time Accurate Arms - 3100). In practical terms, equivalent MVs to H4350 weren't 'on' as I'd arrived at a mildly compressed load with the MV still lacking nearly 100 fps. Two more grains would have been likely needed to get there.
I too have that old manual. An excellent publication in itself and now proving very useful again with today's Lovex grades. I am a fan of the extruded grades, not so much of the ball types - unless they've been improved a lot since I tried them many years back.
Accurate Arms demise was 2004? Time flies - I hadn't realised it was 17 years ago.
Mentioning these powders, I was looking through Wolfe Publishing's Propellant Profiles compendium (reprints of all the old powder features from Handloader magazine) recently and was intrigued to see the original 3100 was surplus DuPont IMR-4831. There was no lot # on the tins as there was only one single huge lot, but when it was gone it was gone. AAC then sourced a replacement from somewhere and hinted it was very close .... but it wasn't. From various things I've read over the years, AAC like Hodgdon initially did quite a bit with bulk surplus lots, later they briefly sourced many powders whose names survive at least from an Israeli factory. The version of the old ball AAC-2520 that was loved by M14 XTC competitors and nicknamed 'The Camp Perry Powder' came from this source and its successors have never been quite as good in this role.
Shooters World said they still import Lovex S071 to the USA for some of their industrial customers, but nothing available packaged for retail sales.
Here's a web link to a set of cross reference information I've made use of between pre-2004ish purchase of Accurate Arms by Western Powders to corresponding Lovex powder.
Here's a web link to a set of cross reference information I've made use of between pre-2004ish purchase of Accurate Arms by Western Powders to corresponding Lovex powder.
Lovex vs Accurate arms
Am I correct in stating that AA powders are now rebranded as Lovex powders in the UK ? If that is indeed the case, what are the equivalent powders from one brand to the other is AA4350 = ? in lovex.
ukvarminting.com
D-4297
Gold $$ Contributor
Thank you . I stand corrected for the misuse of the terms . I thought the statement I made was in direct relation to velocity , or maybe the full sentence wasn't read . Whatever .
centershot
Silver $$ Contributor
Shot XMR again today in my .257 AI. Was very dirty. But, also very accurate. I think that my lot still seems faster burning.
centershot
Silver $$ Contributor
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