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Just found Is this forum Would really appreciate some knowledge From you fellers

1963 Views 27 Replies 15 Participants Last post by  crooked creek
I have an old 1885 Winchester High Wall that was my great grandfather's that is in caliber US30, what they call 30-40 Krag nowadays. This gun is still a shooter. I shoot deer with it every now and again, but I'm trying to set it up for some long-distance shooting for these Quigley matches. I have some ballistic tip boat tail 220-grain bullets. I would like to know what powder to start with. I'm sure this stuff has gotta be a custom recipe for that kind of distance shooting. I would sure like to hear from some old-timers who can point me in the right direction.
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Fair enough. Here's some simple info for you about this subject.

BC is a measurement, against a standard projectile, for how well a bullet can over come air resistance.
There are many standard projectiles, for various bullet shapes; G1, G5, G7, etc.

What most reloaders know/see, are single G1 BC numbers. However when shooting most match type bullets, such as your tipped boat tail; those aren't a good match against the standard G1 projectile. So for such bullets, there are actually several G1 ratings, depending upon speed. If you go to Sierra bullets website, they actually list the 'steps', which will give you an idea of how that works.
Your proposed bullet, is better served by using the G7 coefficient, until you drop below the transonic velocity range. At that point, the lowest G1 becomes a better description of how the bullet flies.

A really easy way to see/track/learn this, is from one of the regularly updated ballistic calculators. Such as Hornady's 4DOF calculator, or the Shooter app by Sean Kennedy.

Best of luck in your efforts. 馃檪

Cheers
Yeah Hey that's cool I get it I understand all the lingo I was just making Is a point That not everyone's Gun Smith I'm not one but my grandfather Was. speaking in layman's terms makes more sense to more people And I appreciate what you have to say And all your easy learning tools God bless
Yeah Hey that's cool I get it I understand all the lingo I was just making Is a point That not everyone's Gun Smith I'm not one but my grandfather Was. speaking in layman's terms makes more sense to more people And I appreciate what you have to say And all your easy learning tools God bless
Yeah Hey I I'm not chasing anything I'm just working up a basic round That I can throw a piece of lead along distance Out of one of the very Only guns produced for creadmotematches in the 1800s Now if you think you could help me I would Love to visit with you When it gets down to pressures and such then we can visit with numbers I might be wrong But the breach pressure on The high wall is somewhere around 400000 ps I Winchester used the falling block receiver to test all There are new ammunition up until like the sixties
I might be wrong But the breach pressure on The high wall is somewhere around 400000 ps I
There is no rifle that can withstand anything remotely close to 400,000 psi.
I believe your 1885 trapdoor would fall under that roughly ~28,000 psi range.

Remember your talking about a rifle built by people in a time where they believed as much in boogeymen and invisible spirits, as fact and reality. So consistency and testing standards could have been a prayer...... Don't push old rifles pressures, they become grenades.

Cheers
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There is no rifle that can withstand anything remotely close to 400,000 psi.
That's the 'beauty' of using punctuation (commas), it helps catch 'typos'!o_O;)
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Periods are good punctuation too. You can tell where one sentence ends and the next begins.

I'm sorry, my mother was an English teacher 馃檮

RJ
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Periods are good punctuation too. You can tell where one sentence ends and the next begins.
In my case, I need a combination of cap first letter following the period, my eyes can sometimes 'see' a comma where there is the period, then the whole thing gets me confused....but that may not just be the punctuation!o_O:confused:;)
, then the whole thing gets me confused....but that may not just be the punctuation!o_O:confused:;)
馃槈馃槈馃槅馃槅馃槅

Gotta get you a current Gen smart phone. Then you can zoom in and out quickly with a "pinching" motion. You can make punctuation large enough for Ray Charles to see it. 馃ぃ
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馃槈馃槈馃槅馃槅馃槅

Gotta get you a current Gen smart phone. Then you can zoom in and out quickly with a "pinching" motion. You can make punctuation large enough for Ray Charles to see it. 馃ぃ
Oh, I've got the phone, but usually use that feature to 'zoom in' on more 'interesting' photos, hadn't thought about it for punctuation...have to give it a try!
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