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Post by 12ptdroptine on Dec 1, 2016 22:39:50 GMT -5
12ptdrop, I'm not trying to be rude but have you tried straight loads of 3031 yet? The only reason I ask is this may be a case of finding a solution to a problem that does not exist. No I havent as yet. Trying to get.as.much information ahead of time as I can Drop
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Post by Richard on Dec 2, 2016 17:10:25 GMT -5
I had enough powder to put together a few loads for next Tuesday. I have 5 gr. of Clays to go under 80 gr. of 3031 and also a few straight 90 gr. of 3031 but might up that to 92 as my "mentor Elkman" indicated!
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Post by 12ptdroptine on Dec 2, 2016 17:29:16 GMT -5
Thank You Richard
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Post by Richard on Dec 2, 2016 21:35:14 GMT -5
Yeah, I bumped the load up to 92 gr. I will try to keep an open mind but still doubt 3031 is going to produce any more accuracy, for me, than the duplex loads with 4198 I have been shooting?
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Post by dannoboone on Dec 3, 2016 10:27:01 GMT -5
Yeah, I bumped the load up to 92 gr. I will try to keep an open mind but still doubt 3031 is going to produce any more accuracy, for me, than the duplex loads with 4198 I have been shooting? The Clays/3031 just might surprise you!
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Post by sew on Dec 9, 2016 9:20:33 GMT -5
I've found that , on average, with duplex loads that temperature sensitivity goes down. I don't begin to have the recent, more advanced experience that most of you have; however, I'll share these thoughts. Using lower loads of a fast for the load powder such as 42-45g VV-110/250-300g bullet in a 50 cal often has a std deviation of below 10'/sec. using a higher load of VV-120 or H-4198 that reaches the same or faster speed will have both a greater std deviation and much greater temperature sensitivity. These higher speeds could be better reached thru duplexing since lower temp sens and std devs stayed low and still gave greater accuracy. I found the same with saboted 45 shooting.. Fast pressure rise has its advantages. For hunting, I'm more interested in have a very low temperature sensitive load than how tight a group is at one setting. Ideally, I'd like to see a group shot with a 40-50 degree variance, i.e. Shot at 20,50,75 degrees. Lower loads of faster powders, ie VV-110 in 45 & 50 and duplex loads in 45-50 cal, sabotless and saboted, And duplex loads in same applications have their advantages from my shooting experiences. Pressure isn't our enemy! Just some thoughts.
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Post by deadeye on Dec 9, 2016 9:38:56 GMT -5
fwiw- just some info from my gun so far. straight I3031 with the 325accumax chrono @ 70-80degrees @ 2930-2940fps//@ 30degrees right @ 2900 area//more testing later as temp drops.
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Post by sew on Dec 9, 2016 14:01:12 GMT -5
fwiw- just some info from my gun so far. straight I3031 with the 325accumax chrono @ 70-80degrees @ 2930-2940fps//@ 30degrees right @ 2900 area//more testing later as temp drops. I think it's worth a lot. Less that 1'/sec per degree velocity loss is very little. 325g of bullet and 80+ g of powder in a tightly loaded 45 is a lot of resistance to movement. Duplexing was initially used to help make up for lack of resistance to movement ( ex: 250XTP short MMP out of a 50 cal. As load wt and loading resistance go up, and as caliber reduces, the advantages of duplex diminish, IMO .
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Post by Richard on Dec 9, 2016 16:59:23 GMT -5
Well, as you might have read in my Wednesday's post, 92 grs. of 3031 under a 300 gr. SST did not ignite in my rifle. (HIS ignition)but very small bushing hole. On the other hand 5 gr. of Clays under 80 gr. of 3031 with the same 300 gr. SST gave reliable ignition for three shots, fairly decent ES's (26 fps I think) and a not so bad group size? (vel. in the upper 2600 range) I just picked up a new 1 lb. of 3031 today, as I am about out of my old can (about 25 years old so yes, can). I will be making up some duplex loads upping the 3031 to 85 gr. and see what happens............that could go up also. If I find that I am using a lot more powder to obtain the same velocities and accuracy does not improve? Then I will just stick with the 4198. Going to the 325 gr. and above weight bullets may be where the 3031 is a better alternative. These heavier bullets are not what I am shooting or have any interest in shooting as I don't have the distance to utilize them. For the Kentucky Challenge which is only contested on paper to 400 yards, I feel the 275 and 300 gr. bullets are all that is needed to be competitive.
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