Wind Gypsy
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I don’t disagree. It’s just seems that seldom does a little tweak in charge weight take something from lousy to good repeatably unless it’s on the extremes of high or low pressure.
Ladder Test for finding powder charge
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I don’t disagree. It’s just seems that seldom does a little tweak in charge weight take something from lousy to good repeatably unless it’s on the extremes of high or low pressure.
Wind Gypsy
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The follow up to this about how they’d do load dev is a good one. Not really what i do but close enough.
Frequently Banned Troll
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So what’s the best route? New bullet, powder, primer, etc. Fastest way to get to a good place to hone in, with fewest of amount of fired rounds? In the past, I’d pick a 3-4gr spread and load up a pile of 3-5 round groups to hone in, this way seems like I can get to a better place, quicker.
Frequently Banned Troll
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Like I said - my fist try at this and hope it’s useful for intended purpose. For me accuracy is more important than velocity.
It’s Bucky
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Curious GH, what’s your accuracy goal? How many rounds do you shoot to establish your cone of fire and zero?
After today I bet you will have a better idea if it works for you than just advice from others. mtmuley
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I’m pretty happy with a “true” 1” or less rifle at 100m. A couple 5 shot groups all inside that are good enough evidence for me with some proof at long range.
slatebuilder
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Everyone has a process that works for them, and that’s cool. Here’s mine for bullets with adequate known data. I’ll preface this by saying that making sure action screws are torqued, bases and rings have the correct screws and are torqued correctly on the rifle is important. I have had several rifles now that were not done correctly by either the factory or people that should know better.
I load one at book max for the given powder and bullet.
Seat it to mag length or put the boat tail junction at the neck should junction.
Shoot into the bank behind the garage. If it shows any sign of pressure at all, back off either 1/2 or 1 grain, depending on case size. If it does not show pressure I load 10 more and go to the range and shoot it at 100.
If it meets my needs, then I load the rest and go shoot. Most of the time that gives a load that is usable for our hunting and shooting purposes in 11 shots.
If it does not meet my needs, I change powder and repeat. If a rifle and bullet will not shoot adequately on two different powders I try a different bullet. If it will not shoot on two bullets and four powders, there is something wrong with the firearm.
If there is little or no data available for a given bullet, then a pressure ladder is absolutely necessary. And once I find pressure, I follow the steps above.
I won't claim to have "the" way, but I'll tell you what I do.
With something I'm very familiar with, like 6 Dasher, I just pick a load based on experience. I might only load 20 to confirm, or depending on circumstances I might load a couple hundred. I've competed with three loads out of my current match barrel and this is what I did for all of them, and the few barrels before that haven't looked much different.
If I'm working with something I'm less familiar with, there's a little too much uncertainty with that approach. I pick the bullet and powder I want to use, find where the bullet sits ~ .030" off lands (assuming it fits in the magazine there), and take a press and powder thrower to the range. I'll load and shoot single rounds over the chronograph, watching velocity and looking for pressure signs. Once I find where I want to be (usually not close to pressure), I'll start loading rounds and shooting a group. Will probably shoot a 10 shot group, but if the first few show it's unacceptable there's no need to continue.
If that doesn't shoot, I might tweak seating depth deeper and try again. Then try a new powder. Then try a different bullet or two. If I still don't have acceptable accuracy, new barrel time.
There's plenty of details and nuance, but that's the general idea. Good luck with your shooting.
Yes. time consuming. but it worked out. It's not all about the group size when looking at your 5 round samples. You also want to look at the change in elevation. Key in on a powder charge that has a pause in elevation change as well. The idea is about having the bullet exit the barrel in the turn around time where it dwells before it changes to go the other direction. This gives you more room for error when it comes to temp changes.
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slatebuilder
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Looking forward to hearing what you learn. This thread might be a good place for some of us to learn some new things.
WapitiBob
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The one thing that affected accuracy the most for me was to put the bullet boat tail jct at the top of the case neck/shoulder radius; night and day difference in two different 7's. No idea what bullet you're loading but the prc is made to seat the bullet long.
Frequently Banned Troll
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I’ve been listening to these things for years but good to hear on this place what people who shoot way more than me do. This was a good listen. I’m all about not wasting time. Just starting now, nice day out for this.
BuzzH
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I'm positive I don't do much right when it comes to load development, but my "method" if you want to call it that, aligns most with what @Carl does. I just sort of go off experience from loading for a bunch of different rifles for the past 40 years or so. I've only found 2 rifles that were a nightmare to find loads for. One got a new barrel, one I eventually found something that works very well.
Following this thread to hopefully learn a few things.
Following this thread to hopefully learn a few things.
I haven't listened to that one specifically but what I currently do is pretty similar to Miles. It's definitely informed by the tests he spent his spare time and money doing, using Hornady's equipment.
There's lots of guys at the top in PRS/NRL and even F-Class who do similarly. I think Tate Streeter essentially picked his Dasher load and shot it through stacks of barrels. Bryan Litz has talked about his results leveling up when he pre-loaded F-Class ammo in bulk instead of "chasing" a load. There's top guy's who are big on load work too, like Cortina.
I won't tell anyone my method will win short or long range bench rest matches, but I don't compete in that. I'm happy with my results for PRS, and am primarily focused on getting to "good enough" as quickly as possible.
I think this worth noting for hunters and guys that participate in ‘practical competitions’. Get a load that’s ’good enough’ and then spend your time/money practicing real world scenarios instead of trying to get another 1/4-1/2” out of your load.
Yep. mtmuley
This is what I’ve been doing lately and so far it has worked well enough. I usually just seat my bullet about .025 off assuming that it fits in the magazine and hopefully has the boat tail above the neck shoulder junction of the brass. I’ll load a series of charges at 1% increments of where I expect it to pressure out. If it was 50 grains I’d load .5 grain increments. I’ll start several grains below book max. I’ll shoot the charges all at the same target at the same time, but I always try to wait for a day with good shooting conditions so that it isn’t a factor in where my shots are landing. Hopefully there will be 3 consecutive shots that land less than 1/2 moa of vertical. Next I will load three shots of each at .4 grain increments between that charge weight. There should be two charges that are grouping on top of the other and I will load all my rounds between those two charges. The last rifle I did the 3 shots that had a 1/2 moa vertical was 58, 58.6, and 59.2. I loaded three rounds each of 58, 58.4, 58.8, 59.2. After shooting those 58.4 and 58.8 shot into one small group. I loaded all my rounds at 58.6. I think total round count to get there was less than twenty five.
Frequently Banned Troll
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The bullets I loaded are about like that not much different BTO than Hornady factory loadings of same bullet, just a touch seated out - I’m just under .020” off jamming into rifling on both rifles.
I expected to hit pressure and have to pull a few bullets tonight, but no signs of pressure even a ways over max listed load.
The shooting went well aside from some gusting winds that may have impacted it a little, but at only 300m still some useful data. Will plot out on the node nonsense and report back. The sample of two is almost meaningless but hopefully my choice for a 10 shot test tomorrow pays off I suspect this one from my rifle and also a 2fps velocity difference between the two. #11
