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you are absolutely right as far as mathematics are concerned, I must have been a wee carried away when trying a bout at vulgarization, thus losing the essence of the topic and introducing a mistake. My bad, really. But I hadn't been wanting to write something along these lines: "Fx=1/2ρV²SCx and...

It all has to do with fluid dynamics equations. In a nutshell, the trajectory of a sphere travelling in a fluid (e.g. air) will not only suffer from a dramatic slowdown due to the frictions with the said fluid induced by the huge cross section of the sphere (the full area represented by the disk...

First of all, as far as ballistic equations are concerned, the main parameters are initial velocity (in close relation with the powder load and the weight)/center of gravity/shape (among many others such as number and depth of the grooves in a rifled barrel/length of the named...

So if my maths are correct, with 7,000 grains to the pound and 32 balls to it, the exact weight should be 218.75 gn, so Pedersoli has it wrong by nearly 50 gn. No tumbling whatever the distance, but the accuracy is not there. With the Walker held in a vise, round balls give groups often under 2...

Here's your data: mean o.a.l. 0.704 (ranging from .703 to .705), o.d. 0.452 (no variation), weight varies (based on a batch of 20) from 167.9 to 169.2 gr, mean weight 168.4. If I may ask, from which source did you get the 220 gr original weight?

Actually loading Pickett bullets in a Walker isn't so difficult : I use the Pedersoli mould for the bullets looking quite the original thing, and I drilled the business end of the ramrod to match the conical design, so centering is not a problem. Accuracy with these bullets is still an issue I...

I've just realized I had been silent for over 3 years! Man, time goes by real fast when you don't pay attention. In a nutshell : extended tour of duty ate most of 2012, then a construction project was my sole focus for the next 18 months, then another tour of duty and here I am. Must have shot...

The modern-day soldier carries a 90+lbs load and in some units it can reach 150+lbs. I've done it for 26 years and my significant other doesn't find me a bit "worn out". ;) The military load hasn't changed a lot since at least the Roman Empire and most Romans lived well into their seventies...

As far as I'm concerned, I don't care whether the lock is on the left or the right side of the gun, but as most longrifles stocks are asymmetrical, I like to rest my cheek on a cheek piece, not on a patchbox, so, so far, I've always built lefty longrifles and if they look weird for the modern...

Oops ! Bad maths from my side I forgot to add the other side of the patch. Another precision, my barrel is .502 at the top of the rifling and .535 at the bottom which explains my choice of bullets and patches. ;)

My barrel is .502, the bullets are .495 so with a .015 patch I would merely match the diameter of the barrel. With .018 or .020 patches, I need to apply a moderate pressure to force the bullet in the barrel and I guess I'm just at the right tightness. As for fouling, I shoot without any problem...

I shoot .495 bullets wrapped in .018 (pillow ticking) or .020 (cotton) patches. Like this, I just need to press hard on the starter to get the bullet in and then a firm pressure on the rod seats it. No mallet is ever used. As for the precision : this group was obtained at 50 yards, standing...

OK, for those who followed my posts, I built a very nice looking and accurate longrifle, so I've started competing with it, MLAIC event n° 36, pennsylvania, with fairly good results. And here's the issue, during the last competition, an other competitor came with a rifle fitted with a peep tang...

I used a grade 4 white curly maple blank. I would have loved a grade 7 one, but the price deterred me. Knowing that it is the second longrifle kit I've built so far and the first one using a blank stock, the odds of ruining it were a bit too high for me to put that much money in what could have...

That's a perfectly good-looking bolt action opposed to the millions of others with the bolt handle on the wrong side...

Showing some promises :

in thirty odd years of shooting, I've never witnessed it nor has it ever occurred to me. Maybe I've merely been lucky 'til now...

Could you be more precise with your question, I'm kind of lost here. :confused:

Latest video, with slow motion sequences : http://www.youtube.com/watch?v=g6y55nUCHK4 and just for the fun, an older one I had nearly forgotten about : http://www.youtube.com/watch?v=oK5S1QGgqEs

Haven't tried 1000 rounds yet, but I've already shot 200 BP rounds in a row with my Winchester 1873 44/40 rifle without the slightest problem and an accuracy I can't reproduce when shooting smokeless with the same rifle.