Cronograph

[MRSFISHERMAN]

So for xmas my wife bought me a cronograph. I am going to go out back and shot my muzzel loader. I am going to shot several bullets and charges. I will shoot a 240, a 300, and a 405 grain bullet. I will shoot two pellets and three pellets. After I do this (weather permitting on Sat.) I will post my findings for the foot pounds at the barrel for these different loads. I wolud like to know what they are.
Joe Termite
P.s. Iam going to Cabela's on Sunday, anybody want me tp price anything?

[robhunt]

Yeah can you give me a ball park price of all the right handed bows and accessories and all camo cloths and all fishing stuff and fly fishing but more salt water stuff and shotguns 12 gauge brownings and so on......
Thanks

[MRSFISHERMAN]

Yea sure, be glad to.
Joe Termite

[HUNTIN-NUT]

chronographs are great tools - have fun with it. When I first got my inline I played with all kinds of loads changing bullets, powders, etc and shot them all over the chrono - really separates the efficiency of the powders. For instance at the time, which was about 10 years ago - 777 powder outperformed every other powder for velocity grain for grain. Nothing close. I settled on loose powder and when you match velocity to accuracy you can really find the sweet spot for your gun. You will find where increases in powder may become inefficient as you might only gain a couple fps per 10 grains indicating powder being burned outside the barrel. I plan to try a couple of the newer powders this spring such as blackhorn to see how it stacks up. Shooting is always fun and the chrono now gives you good data to go with the fun.

[MRSFISHERMAN]

Is there any formula for the kenitic energy other than weight times speed for a known distnce. I really do not want to shoot through it at 50 yards.
Joe Termite

[jmangold]

Any data from the new chrono yet?

[MRSFISHERMAN]

:)Went out back this morning before it started to rain. I shot 240, 300, 405 grain hollow point bullets with two pellets and three (100 grains and 150 grains). These are the results

100 grains 150 grains
Speed and ft.lbs. Speed and ft. lbs.

240 1824 / 437,760 2194 / 526,560

300 1712 / 513,600 2024 / 607,200

405 1495 / 605,475 1630 / 660,150


As you can see yes the 240s flew much faster, but the knockdown energy is greatly reduced by 27 % with 100 grains of powder,and by 20% with 150 grains compared with the 405.
The difference in speed between the 100 grain charge and the 150 grain is.

240s ---- 16.0%
300s ---- 15.41%
405s ---- 8.28 %
So make up your own mind, but for shooting at deer under 50 yards, over bait I will stay with the Powerbelt 405 hollow point and 150 grains(3 pellets) in my woods. Or if I feel like resighting in my gun next season I may drop down to two pellets and a 405.
Joe Termite
Somebody can check my math:)

[MRSFISHERMAN]

I thought I read that foot pounds of energy was speed times weight.
I was reading one of my books and realized that something was wrong. I went on the computer and looked up foot pounds and found a conversion chart to plug in weights and speeds.
These are the new numbers at the muzzel of my muzzel loader.
Sorry,
Joe Termite

100 grains of powder 150 grains of powder
speed/ foot pounds speed/foot pounds

240 gr. bullet--- 1824 / 1772 2194 /2565

300 gr. bullet --- 1712 / 1952 2024 / 2728

405 gr. bullet --- 1495 / 2009 1630 /2389


Sorry about the mistake, I knew it did not look right, but any how, I will stay with the 405 grain bullet and the three pellets. I like to hit them hard.
Looking at a balistic chart a 30-30 loaded with a 170 gr. bullet has a muzzel speed of 2200. Just some numbers to look at. The 240 grain bullet with two pellets/100 grains scares me. Some people use even less powder than 100 grains with these light bullets. Do what you want, but these are the numbers.
Joe Termite

[MRSFISHERMAN]

The Barn keeps pushing my data together even when I leave spaces.
Joe Termite

240 grain bullet --1824/1772 xxxxxxxxxxxxxxxxxxx2194/2565
300 grain bullet---1712/1952xxxxxxxxxxxxxxxxxxx2021/2728
405 grain bullet--- 1495/2009xxxxxxxxxxxxxxxxxx1630/2389
I am gonna check these numbers again, do not feel like typing all thais again. Will be right back.
Lookingat this chart the 300 with 150 grains hitts harder.
Be right back.

[MRSFISHERMAN]

Kinda o fstrange the 300 grain bullet with 150 grains of powder hits the hardest, followed by the 240 with 150 grains. and the largest bullet comes in last. HMMMMM got me thinking about this. I like the bigger bullets more lead, bigger holes. will see. I am sure all these posts will start some comments.The cronograph has definetly opened my eyes.
Joe Termite
p.s. I was not cleaning the barrel between shots, trying to get done before the rain. I wonder if that would have made a speed difference.
Will try the 300s and the 405s again soon.
Joe Termite

[MRSFISHERMAN]

Went into my hunting books this morning. I read somewhere that the minimum foot pounds to take a deer humananly was 800. I have a NRA white tail deer hunting book that say's 1200 foot pounds. I have another book the Art of Hunting by The Hunting and Fishing library, this book say's 900 foot pounds is the mininium.
I will reshoot my gun with the same bullets and loads and clean the barrel between shot, to seeif this makes a speed difference. I might set up the crono down range at 50 yards. My gun is sighted in for the 405s. Will have to see how it shots the 240 and the 300, before I put the crono downrange.
Joe Termite
I can not find the formula for foot pounds???????????

[robhunt]

I looked to with out no luck.
Thanks for all this info

[robhunt]

The formula to compute torque is simply this: T = F * d. ChaCha on!

I asked chacha what it was and this is what it said but it prob won't help

[Pagrizz]

This is the formula I use Speed of bullet times speed of bullet times weight of bullet divided by 420240.Example 1800 x 1800 x 250 divided by 420240 comes out to 1927 foot pounds