Posted: 5/26/2018 6:56:30 PM EDT
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I reload for a 6.5 creedmoor in a thompson center compass rifle. I recently loaded up some 140gr RDFs at 2800 FPS muzzle velocity. Today I had the chance to shoot at what I guestimated at 1000 yards, give or take. I punched the numbers into Strelok and came up with 110 clicks up. This didn't even register a splash anywhere near my target. So, I started clicking down, I got to where I was at 50 clicks up from zero and I was still hitting high. I ended up at 40 clicks up and I was pegging the rock at 1000 yards pretty easily. My question is: How was strelok so wrong? 140gr RDF, .65 BC at 2800 FPS. 1/4 MOA clicks on the scope. Zero at 100 yards. |
"No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country." George S. Patton
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Originally Posted By boman250:
I reload for a 6.5 creedmoor in a thompson center compass rifle. I recently loaded up some 140gr RDFs at 2800 FPS muzzle velocity. Today I had the chance to shoot at what I guestimated at 1000 yards, give or take. I punched the numbers into Strelok and came up with 110 clicks up. This didn't even register a splash anywhere near my target. So, I started clicking down, I got to where I was at 50 clicks up from zero and I was still hitting high. I ended up at 40 clicks up and I was pegging the rock at 1000 yards pretty easily. My question is: How was strelok so wrong? 140gr RDF, .65 BC at 2800 FPS. 1/4 MOA clicks on the scope. Zero at 100 yards.  ? Rough numbers I plugged into my calculator say 1000 yards would be about 8.32 Mils come-up. What was your Air Density ?
2800 fps is pretty snazzy. What is your load and barrel length ? |
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Originally Posted By ScoutH57: Well are you any good at estimating range ? Rough numbers I plugged into my calculator say 1000 yards would be about 8.32 Mils come-up. What was your Air Density ?
2800 fps is pretty snazzy. What is your load and barrel length ? I paced off a 250 yard land mark. This was far beyond triple that distance. Maybe I should pace off the 1000 yard object. Lol. Even if i completely estimated wrong, my calculator says 37 clicks to 500 yards. That would put my bullet drop about right for half the distance I was estimating. I'm not that bad, i think. |
"No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country." George S. Patton
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No way you are getting 2800fps from a 140gr out of a 22" barrel. I would say more of mid 2650. How far is your scope above bore. Atmospherics? Altitude? Scope? No way 10 MOA is even getting you close to a 1000 yards. You would have to have a MV of 4150fps to have 10 MOA for 1000yds. |
The louder you scream...the faster we come!!!
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Originally Posted By ScoutH57: Well are you any good at estimating range ? Rough numbers I plugged into my calculator say 1000 yards would be about 8.32 Mils come-up. What was your Air Density ?
2800 fps is pretty snazzy. What is your load and barrel length ? thats at 75*, 29.5 Hg, 1500 ft elevation and 56% humidity... At 2350fps I get 39.4MOA @1000... OP needs a quality range finder or tape measure..OP if you have an I-phone get the app "Virtual Measuring Tape..." its free, and it works from inches, to yards, to miles.....at least you will be closer enough to get correct dial ups..... |
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I recently downloaded a distance app. Works good. I haven't been back to the same place to see how far the original target was. It's quite possible I was off on my estimate. 2800 fps is what my chronograph had consistently told me for this load out of this rifle. |
"No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country." George S. Patton
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Originally Posted By boman250:
I reload for a 6.5 creedmoor in a thompson center compass rifle. I recently loaded up some 140gr RDFs at 2800 FPS muzzle velocity. Today I had the chance to shoot at what I guestimated at 1000 yards, give or take. My question is: How was strelok so wrong? Before getting a range finder I used GPS and google maps if I had a decent landmark. That worked pretty good. You can't really walk off or even physically measure those distances because the ground isn't flat enough. Good rangefinders are inexpensive. Get yourself at least a decent thermometer to get ambient temp at your location. A rough *station pressure, accurate MV, exact zero at 100 and you should do much better with predicted drops. *Attached File |
MOA ALL DAY- 169 Arfcom rifles confirmed
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Originally Posted By boman250:
I recently downloaded a distance app. Works good. I haven't been back to the same place to see how far the original target was. It's quite possible I was off on my estimate. 2800 fps is what my chronograph had consistently told me for this load out of this rifle. 10MOA comeup from 100yd zero won't get you to 1k yards. 2800 is moving quick, but even so, your range estimation is off. I've got an MOA scope on my gas gun (22" krieger w/ 140eldm@2750fps). I'm pretty sure I needed two+ full revolutions of the turret at 12MOA/revolution. |
"History teaches us that men and nations behave wisely once they have exhausted all other alternatives."-Abba Eban
"I like it both ways, but still mainly mouth it" -gonzo_beyondo
"I like it both ways, but still mainly mouth it" -gonzo_beyondo
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Originally Posted By boman250:
I recently downloaded a distance app. Works good. I haven't been back to the same place to see how far the original target was. It's quite possible I was off on my estimate. 2800 fps is what my chronograph had consistently told me for this load out of this rifle. |
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Originally Posted By boman250:
I recently downloaded a distance app. Works good. I haven't been back to the same place to see how far the original target was. It's quite possible I was off on my estimate. 2800 fps is what my chronograph had consistently told me for this load out of this rifle. |
The louder you scream...the faster we come!!!
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Someone mentioned google maps as a way to get distance. So, I got on google maps, clicked my position at the time, and the rock I think I was shooting at. It was about 533 yards... I was way off. Guess that comes with experience and proper tools. Chronograph is always at the end of the concrete at the range. 15 or so feet. |
"No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country." George S. Patton
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Originally Posted By boman250:
Someone mentioned google maps as a way to get distance. So, I got on google maps, clicked my position at the time, and the rock I think I was shooting at. It was about 533 yards... I was way off. Guess that comes with experience and proper tools. Chronograph is always at the end of the concrete at the range. 15 or so feet. |
swingset
No one wants to eat right and exercise, and lower their stress levels, all of which will come in a lot more handy than a home defense carbine and chest rig
ANIMUS
Rude pricks need a serious traumatic life experience
No one wants to eat right and exercise, and lower their stress levels, all of which will come in a lot more handy than a home defense carbine and chest rig
ANIMUS
Rude pricks need a serious traumatic life experience
