6 Dasher H4350?
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Hello guys,
I’m looking for information from guys running H4350 in a 6 Dasher.
I want to try this powder but I haven’t found a ton of information.
I’m running Alpha OCD and Berger 109’s.
Any data and tips would be greatly appreciated.
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It is my number one powder for BR-based cases. I run 105's with 34gr of H4350 in my dasher. 31gr in my 6BR.
My 22BR with 80gr berger VLD's likes 31gr as well.
I'd start about 30 thousandths off the lands and at about 28gr of H4350. I bet you run into it somewhere about 33.2gr... but obviously you should do the work and see where the barrel wants to be.
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Thanks for the information. Do you think 34gr ish to be a good number for the hypothetical max charge? Like 28 to 34 gr or should I go load up to like 35 gr and watch for pressure signs?
I’m going out to my 600 yard range tomorrow so I’ll report my results.
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Run a pressure ladder in 1 gr increments. Find pressure, then stay at least 1.5 gr away from it. Obviously if it’s extremely hot during dev, you know you can be close and the rest of the year you’ll be under.
Realistically you want to be in the low node anyway. The barrel will tell you what it likes.
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Decided to load last minute last night to be ready for today.
I’ve run from 32.6 to 34.4 gr of H4350 and shoot 3 ladders at 300 meters.
Here are the results
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I’m not sure where I want to go with those one🤔
I think I’ll load all the different charge with the lowest vertical and test them at 300/600 to see what happen.
Any other opinions?
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@kn-precision said in 6 Dasher H4350?:
I’m not sure where I want to go with those one🤔
I think I’ll load all the different charge with the lowest vertical and test them at 300/600 to see what happen.
Any other opinions?
33gr looks like a very stable place to be. 2815-2830 with 109s should always be pressure safe. That range is producing consistently less vertical.
I look at groups first, and seldom give ANY consideration to ES/SD unless it's poor (30+ ES). Every single group produced very acceptable ES numbers. I can't think of ever seeing good groups with unacceptable ES/SD.
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Very much agree with tscustoms post. Positive Compensation will overcome any reasonable es/sd variance.
What distance are you working at?
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Im not sure I’m understanding positive compensation? I’ve read that it’s when the slowest bullet impact higher than the fastest bullet within the same powder charge but I don’t understand how you do a load development based on positive compensation?
I’m working at 600 and 1000 meters most of the time. Sometime we’ll stretch our leg to 1450 but that’s once or twice a year.
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@kn-precision I found this article that you may find interesting. http://www.geoffrey-kolbe.com/articles/rimfire_accuracy/tuning_a_barrel.htm
I think the article refers to rimfire, but I'm also thinking that the harmonics are relatable to centerfire as well. Let me know what you think! Take care ..
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@kn-precision Yup, slow rounds can group right with fast rounds due to muzzle positioning on bullet exit. That’s the simple explanation.
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@orkan said in 6 Dasher H4350?:
@kn-precision Yup, slow rounds can group right with fast rounds due to muzzle positioning on bullet exit. That’s the simple explanation.
Do you use a specific way to develop your load based on positive compensation or you just analyze the groups in relation to each round speed within the same group or range of charge with a similar poi?
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@kn-precision Groups and poi in relation to other charges tells the tale.
