sporting mathematics

[ips]

for fun and curiosity (my brain cant cope with it)

scenario

left to right crosser doing average speed (whatever that is, please advise and insert mph) at lets say fourty yards

cartridge doing 1200 fps observed.

question

1 how long does it take the shot to travel fourty yards.

2 how far has the clay traveled in that time

answers on a post card ..... Or post below ?

 

[Xaphan]

to keep it simple for my own sake

a clay doing 40 mph is traveling at 58.6 fps

and shot string traveling at 1000fps will take 0.1second to travel 100 feet... 100 feet is about 33 yards

so in that 0.1 seconds the clay will have traveled 5.86 feet

assuming the clay is 33 yards out...you will need to give it 5.86 foot of lead 

 

[ips]

wow

fabulous answer many thanks that helps me put things into perspective ?

cheers

 

[westley]

wow

fabulous answer many thanks that helps me put things into perspective ?

cheers

Thats a relief cos,   I'll bet yer ave bin behind em ?  

 

[ips]

no idea ?

 

[Rupert]

5.86 ft is 1786.128 mm for those of the metric persuasion

 

[Darkside]

for fun and curiosity (my brain cant cope with it)

scenario

left to right crosser doing average speed (whatever that is, please advise and insert mph) at lets say fourty yards

cartridge doing 1200 fps observed.

question

1 how long does it take the shot to travel fourty yards.

2 how far has the clay traveled in that time

answers on a post card ..... Or post below ?

Who gives a f*ck!!! 

 

[ips]

??

Who gives a f*ck!!! 

just out of curiosity mate. But your prob right ?

 

[Xaphan]

If man wasn't curious we'd still be hunting antelope with sticks on the plains of Africa   :wink:  

 

[Doctor Lecter]

they still do north of the border !!   :baby:     :bye:

 

[Skeet UK]

Regardless of initial MV, most sporting cartridges have slowed to around 600fps by 40 yards.  They can lose 150fps in the first meter of travel.

A good thing to remember, is on station 4 of a Skeet layout, the targets are crossing 21 yards away at about 40mph and need 4 feet of lead.

Double the distance almost tripples the lead (to a point).

Obviously, this is only the actual lead, what you perceive when gun speed etc are thrown in, and how or if you can reliably determine what 9 feet in front of a clay at 40 yards, looks like....is another kettle of fish!

 

[ips]

Thats a relief cos,   I'll bet yer ave bin behind em ?  

sorted for hodnet now Westley. I shall bring pen paper and calculator ?

 

[westley]

sorted for hodnet now Westley. I shall bring pen paper and calculator ?

Will the measurements be in 'New' or 'Old' money then ?

 

[ips]

new money ..... Probably ?

 

[Jonny English]

I tend to run roughly on the following for an average bird:

20-30 yards 1 foot per 10 yards (2-3 feet)

30-50 yards 1 1/2 foot per 10 yards

50-60 yards 2 feet per 10 yards

60-70 yards 3 feet per 10 yards

Slowing birds work it out as if 10 yards closer. Very fast birds add another 50%

Just a little something I try to use if I have no clue as to what lead to try and set off with.

 

[DolphinCTC]

to keep it simple for my own sake

a clay doing 40 mph is traveling at 58.6 fps

and shot string traveling at 1000fps will take 0.1second to travel 100 feet... 100 feet is about 33 yards

so in that 0.1 seconds the clay will have traveled 5.86 feet

assuming the clay is 33 yards out...you will need to give it 5.86 foot of lead 

I think these sums only apply if the gun is held still, but dont ask me to work it out for the gun swinging!!

 

[Xaphan]

I think these sums only apply if the gun is held still, but dont ask me to work it out for the gun swinging!!

not sure it would make much difference as to whether the gun was still or swinging because once you have pulled the trigger the shot will be moving in pretty straight  trajectory from the moment it leaves the barrel.... that said it certainly doesn't take into account drop off i.e the effect of gravity and the parabolic trajectory the shot will take and it also assumes that the shot is still traveling at 1000fps after traveling 100 feet and it doesn't take wind into account either which can make the shot drift in any direction

I think its reasonably fair to say (without splitting hairs) that its correct apart from the "5.86 foot of lead" maybe, which has an almost infinite number of variables eg. Air density, wind etc.      

 

[Salopian]

Is this with a high rib and no bead or low rib with bead or a HPR or RSR, incoming, dropping , curling and does your gun shoot to point of aim .

What difference do subsonics make ?

 

[Xaphan]

OP was talking about crossers but same maths apply in any direction apart from the perceived lead, as above its not taking into account drop off etc.

it also assumes you are shooting where you are pointing and 1000fps is already subsonic anything over 1126fps is breaking the sound barrier