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First time using this powder and it reminded me of what I've seen when folks are firing black powder....a fair amount of smoke. Using 2.5 dipper for a 180gr cast with gas check and at 50 yards they were all over with about a 12" group. The chart with the dippers says this is 25.2 grains. Not impressed. However I did shoot those same bullets with 14.5 grains of Unique and at 25 yards touched 3 out of 5 shots. 85 degrees and about 60% humidity....I lasted longer than my partner in the sun. Remind me to stop using metal chairs.

Forgot to add, 1929 Tula Mosin Nagant that's been put together from parts. Hope that don't twist someone. Reverse bubba I guess.
 

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I use 20 grains IMR 4759 behind lyman's 314299 sized to .3135 for about 1600 feet per second. Winchester large rifle primers. Cases are Hansen Cartridge company made in yugoslavia. Probably similar to the privi nny stamped cases. My barrel on the finnish reworked model 27 dated 1935 slugs out at .3115. Have not noticed the smokyness you mentioned. Have a sneaking idea that your load is kinda on the warm side for that weight cast boolit. Hope this helps. Frank
 

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I use a lot of SR4759, but for reduced loads with jacketed bullets. I have not noticed it to be smokey in that application.
I've used it to produce groups under 2" at 100y with several rifles, so it can be accurate as well.
 

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I'm using 25 grain of SR4759 in 11.3x52R Beaumont case under 340 grain .457 slug at average of 1290 fps- dead accurate @100 yards and absolutely no smoke. But with 24 grain it just doesn't work at all. I would not rely on a dipper for measuring consistent charges - smokeless powders are meant for gravimetric methods not volumetric like the black powder. SR4759 is great powder but i would leave it to large cases and calibers. Unique and Blue Dot work much better in 7.62x54/8x50R/8x56R/8 Lebel etc.
 

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The smoke may or well may not be the powder.

I don't shoot cast rifle loads.

I was (last fall) doing new load testing in 9mmP (replacement IDPA load).

Vhit. N-340 is my 115gr JHP load, not a bit of smoke.

Under my 145gr LRN, quite a cloud, somewhat less pressure, and significantly less velocity (almost 400fps).
I had a similar cloud under that bullet from all 4 powders tested (N-340, Power Pistol, Blue Dot, and Longshot).

Bullet-lube, not the powders.

Strangely, same bullet maker, I get very little smoke from .45 Auto loads, a lot from the 9mmP.
 

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Yep that load is a tad warm IMO I dont have data for the 54R but in a 308 win with a 178gr cast bullet Lyman lists start load at 19.0 and max at 26.3 which is making 47K+ cup pressure!

Start at 18 grs and go up 1/2 gr step till you find the accuracy .
 

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I agree with RU I think the load is too hot. I have fired blitz bullets too fast from a rifle and had them come apart in flight. They would leave a gray smoke trail (the lead coming apart). I believe you are seeing lead in the air which would explain the very poor groups as well.
 

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4759 is a smokey powder. I use it exclusively for cast bullet loads in .30-40 Krag, .30-06, .45-70 and .303 Brit. I've had great luck with it in everything but the .303 (which is a rifle issue - not a load issue). However, my best groups have all been found at the lower charge weights - 19 gr in the Krag, 22 gr in the '06 and 23 gr in the 45-70. 4759 is an excellent cast bullet powder - embrace the smoke.
 

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A friend of mine and I have experimented with 4759 at the higher charge weights all the way up to the max book recommended weight in .30-06. We've had no success at higher charge weights with this powder. If you want higher MV in a cast bullet load, switch to a slower powder like 3031 or even 4350. However, DO NOT use charge weights below the minimum weight recommended in the loading manuals with powders slower than 3031 - a detonation can occur with small charges of slow powder and that will ruin your day. Sitck with fast powders for reduced charges.
 

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4759 is a smokey powder. I use it exclusively for cast bullet loads in .30-40 Krag, .30-06, .45-70 and .303 Brit. I've had great luck with it in everything but the .303 (which is a rifle issue - not a load issue). However, my best groups have all been found at the lower charge weights - 19 gr in the Krag, 22 gr in the '06 and 23 gr in the 45-70. 4759 is an excellent cast bullet powder - embrace the smoke.
Kragluver Have you had good results with the midweight bullets also with 4759 , ie: 150-160 gr Ive only shot that powder on a limited basis but mainly with the heavier 185 and up range in the 30-31 calibers.
 
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