EzGoingKev
NES Member
My rangefinder too.It’s 300 with my rangefinder. The 200 is a little more, like 203 or 205.
Dave
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My rangefinder too.It’s 300 with my rangefinder. The 200 is a little more, like 203 or 205.
Dave
still think he came up off 200 yard zero.That suggests that the BC entered isn't correct.
Was looking at this one or the Magnetospeed Sporter myself
Was looking at this one or the Magnetospeed Sporter myself
MagnetoSpeed Sporter Barrel-Mounted Ballistics Chronograph Kit, Black, Ultra-Compact Case Amazon product ASIN B00VTZXF8YView: https://www.amazon.com/dp/B00VTZXF8Y/ref=cm_sw_r_cp_api_i_KSAsEb9AB1MQH
An updated from hitting the range today. Unfortunately I don't have a chrono so I scoured the web from Sniper's Hide to Precision Shooting and so on and mapped out everyone's velocity with the same rifle. All of them were around 2700 with Hornady 140gr ELD Match rounds so until I can chrono it myself I'm going with 2700 in my calculator. I also confirmed from several sources the BC for this bullet is .646 using G1. I even remeasured the center bore to the center scope with a caliper and it's exactly at 2.1". I also updated the correct temp and humidity just to make sure I had everything right.
So I scrapped everything I did previously and started from scratch on the 100 yard range. I zeroed my scope at 100 yards and then headed over the 200/300 yard range. At the 200 yard range I came up .4 from my 100 yard zero and had repeated accuracy. I then went over to the 300 yard range. To make sure I wasn't coming up from my 200 yard zero I backed the scope down to my 100 yard zero and then went up to 1.1 per the calculator. Once again I was shooting high at 300 yards. I back down to .8 over my 100 yard zero and came repeated my accuracy from last week. It would seem that my rifle/scope combo wants to be a freak....
I'm still going to attend the Grandby match next weekend and see how it goes. I'll have to see next week if the .3 under what the calculator says stands true as I up the distance or if it exponentially increases as the range increases. Hoping it's the first one but have a feeling it will be the second.
Why are you using G1 instead of G7? G1 BC vs G7 BC vs Bullet-Specific Drag ModelsBC for this bullet is .646 using G1
i just ran G7 on hornady cal. It calls for .1 more mil for 300 yard come up. Than the G1 model?Why are you using G1 instead of G7? G1 BC vs G7 BC vs Bullet-Specific Drag Models
If you could sneak out one more time and just go through your come ups at 100 yard or just run your scope up 5mils in 1mil increments and see just how well your scope tracks. ? You can draw up a target with the impact area laid out.An updated from hitting the range today. Unfortunately I don't have a chrono so I scoured the web from Sniper's Hide to Precision Shooting and so on and mapped out everyone's velocity with the same rifle. All of them were around 2700 with Hornady 140gr ELD Match rounds so until I can chrono it myself I'm going with 2700 in my calculator. I also confirmed from several sources the BC for this bullet is .646 using G1. I even remeasured the center bore to the center scope with a caliper and it's exactly at 2.1". I also updated the correct temp and humidity just to make sure I had everything right.
So I scrapped everything I did previously and started from scratch on the 100 yard range. I zeroed my scope at 100 yards and then headed over the 200/300 yard range. At the 200 yard range I came up .4 from my 100 yard zero and had repeated accuracy. I then went over to the 300 yard range. To make sure I wasn't coming up from my 200 yard zero I backed the scope down to my 100 yard zero and then went up to 1.1 per the calculator. Once again I was shooting high at 300 yards. I back down to .8 over my 100 yard zero and came repeated my accuracy from last week. It would seem that my rifle/scope combo wants to be a freak....
I'm still going to attend the Grandby match next weekend and see how it goes. I'll have to see next week if the .3 under what the calculator says stands true as I up the distance or if it exponentially increases as the range increases. Hoping it's the first one but have a feeling it will be the second.
I don't have the Hornady app. but the G7 is more appropriate for the type of bullet he's shooting so that's why I asked him. Something certainly does seem off though.i just ran G7 on hornady cal. It calls for .1 more mil for 300 yard come up. Than the G1 model?
I don't have the Hornady app. but the G7 is more appropriate for the type of bullet he's shooting so that's why I asked him. Something certainly does seem off though.
G1 data is definitely still more abundant. I did find the info on hornady web site but it did not matter much. Im pretty sure I clicked the G7 mode BUT I was rushing my phoneI used G1 as I didn’t know any better.
I don’t have a chrono so I’m grabbing the details from Hornady’s web site. They list the velocity per bbl length and 2710 is what the list for a 24” bbl. guess it has to be wrong.
I ran a set of numbers, 0.3 up at 200 (within your error probably vs 0.4), 0.8 up at 300 - these match what you have.
Velocity to get this is just over 2900fps which is right for a hornady 120g eld match in the rifle. Are you sure you have 140g?
Why are you using G1 instead of G7? G1 BC vs G7 BC vs Bullet-Specific Drag Models
Based on your post I tapped through and read the article. I’ll never use G1 again if I can get G7 data.That was an interesting read.
I can tie a string to Megan's leg, have her fly down there and then measure the string. Jack.
Can't understand all this, we have a member with a 308 shooting that 300 range and he tapes dimes to a target and hits them... no chrono just a few sighters and a click here and there. it is fun to watch him.
shoot it at range and keep a log book time. temp, ammo, wind. i have never found an ap that was perfect, they can get you close but have to be tweaked.
I prefer to use my hunting range finderJust get a 600 ft tape measure and check it out. Jack.