In my estimation, anyone who wants to have a "hot" load for a milsurp has disqualified himself by showing an irresponsible attitude.
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In my estimation, anyone who wants to have a "hot" load for a milsurp has disqualified himself by showing an irresponsible attitude.
That is, in fact, the only cartridge I did not test much with.
N140 is the fastest powder accepted, with light bullets at that.
With N150, my 140grs fmjbt bullets behave very well.
Well, I got the Swede, but unfortunately, I missed out on the carbine. I was outbid on a sealed bid auction by a paltry £3 (It was a nice one too. That prompted some bad language, I can tell you!!).
Instead, I picked up a Carl Gustav M38, done on a 1908 M96 receiver.
I managed to get it to the range last week to try out with some N160 and H414 reloads and I put up some groups that showed promise.
Now, I have to admit that indoor lighting, my eyes and open sights are not a good mix and the best I managed was a bit over a 3", 5 shot group. I'm hoping I can improve on that on an outdoor range.
To be continued.
I'm handloading for my Carl Gustav M96 (anno 1901). I obtain good accuracy with N 160 / 44.0 behind 140 g bullets (SMK, Hornady) and 139 Lapua (my rifle prefers 140 to 120 g).
https://www.milsurps.com/images/impo.../MDrix24-1.jpg
https://www.milsurps.com/images/impo.../Jkv24Lh-1.jpg
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Good news. I managed to get to the range again last week, and this time I took along some loads utilising 140grn Sierra Match Kings and 144grn Lapua Scenar bullets. I opted for the load which had given best accuracy with the cheap PPU bullets I used on my first outing, which was 44grn N160, and seated the bullets as far out as I was happy with (seated about half a calibre deep).
Because of the longer COAL, pressure was a little low in these and they produced smoke streaked cases, but I was very pleased with the accuracy this time out.
My next batch will be either a slightly heavier charge, or I'll seat the bullets a tad deeper to see if I can boost the pressure a little bit, but safe to say, "it's all looking very promising".
Congratulations! Great cartridge! Very advanced for a first (or maybe second) generation smokeless powder design.
And quite responsive and friendly.
Don't forget H380 and H4831.Quote:
Originally Posted by harry mac
Negative. Burn rate is based on sectional density of bullet (heavier bullet takes slower powder) and expansion ratio of interior of cartridge and bore (bigger diameter bores require a fast powder to keep up with the expanding volume). I tend to shoot heavy bullets like the 156/160 grain round nose types. Which is why I favor slower powders.Quote:
Originally Posted by harry mac
Not a bad place to start for getting used to the round. The initial loading used a 160 grain bullet (just above 10 grams in metric) with a muzzle velocity of 2150 (give or take) in the short barreled carbine.Quote:
Originally Posted by harry mac
The 139 grain (9 gram) bullet was introduced in about 1941 and that loading was mainly used in the M38 (in between length) rifle.
I find a slightly less than maximum load of H4831 with the 160 grain Hornady bullet produces just over the advertised muzzle velocity of the M94 cartridge. In my rifle, of course. The rifle is sporterized but the barrel is stock. I find loading data in the Lyman #50 book. I'm also doing some preliminary research with H380, but have no conclusions as yet.
Still, burning rate is determined by bullet weight (sectional density) and expansion ratio, not barrel length.