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Winchester 140 Grain Match Ammo

Started by CLAYPOOL, July 24, 2014, 03:09:40 AM

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Rob01

Quote from: Jackson6.5 on May 24, 2015, 07:47:04 AMAnd ammo temp will make a huge difference in MV, and drop at long ranges, especially if you let a cartridge sit in a hot chamber while you are getting ready to take a shot. A 20* rise change in temp will put you around around mil high at 1000.

20 degree temp change won't move impact a mil at 1000.  Look at the temps below for changes per degree. The most is 1.71 per degree. Using that and 20 degrees it comes out to about 34 degree change. Running my data on JBM, which I know is good, my load at 2895fps with the 140 AMAX is 7.9 mils at 50 degrees at 1000 yards. When I go up to 100 degrees it changes it to 7.6 mils. I have shot the H4350 loads from the teens to over 100 degrees with minimal chrono'd data shift.  Might be a tenth or two at 1000. That is from the ammo being in those conditions. Granted that is with H4350 and not the new powders being used but even if they were more there still wouldn't be a full mil shift.

HS-6 1.21fps per *
H110/W296 1.24 fps per *
Imr4227 1.17fps per *
Lil' Gun 1.31 fps per *
RL10x .71 fps per*
Benchmark .44 fps per *
Imr3031 .73 fps per *
Imr8208xbr .59 fps per *
H4895 .23 fps per *
Alliant Varmint pro .89 fps per *
Alliant AR comp .77 fps per *
Varget .19 fps per *
W748 1.32 fps per *
Imr4064 .53 fps per *
Ramshot Tac .91 fps per *
Imr4895 .87 fps per *
AA4064 1.11 fps per *
AA2520 .98 fps per *
RL15 1.52 fps per * from 50* and up
PP2000MR .99 fps per *
Imr4320 1.32 fps per *
Ramshot Biggame .98 fps per *
H380 1.44 fps per *
VV N150 1.08 fps per *
H414/W760 1.42 fps per *
Imr4350 .64 fps per *
AA4350 .47 fps per *
H4350 .29 fps per *
RL17 1.42 fps per *
Hybrid 100v .78 fps per *
RL19 1.61 fps per *
VV N160 1.24 fps per *
Imr4831 1.19 fps per *
Ramshot Hunter .86 fps per *
H4831 .36 fps per *
RL22 1.71 fps per *
Imr7828 1.36 fps per *
Magpro 1.01 fps per *
H1000 .21 fps per *
RL25 1.59 fps per *
Ramshot Magnum .87 fps per *
Retumbo .49 fps per *
RL33, still trying to get my data for this one.
US869 1.68 fps per *
H50bmg 1.64 fps per *

The Marshall

Of all the gin joints in all the towns in all the world, she walks into mine.
Every man has got to know his limits.

exsimguy1

Quote from: Rob01 on May 24, 2015, 08:18:59 AM
Quote from: Jackson6.5 on May 24, 2015, 07:47:04 AMAnd ammo temp will make a huge difference in MV, and drop at long ranges, especially if you let a cartridge sit in a hot chamber while you are getting ready to take a shot. A 20* rise change in temp will put you around around mil high at 1000.

20 degree temp change won't move impact a mil at 1000.  Look at the temps below for changes per degree. The most is 1.71 per degree. Using that and 20 degrees it comes out to about 34 degree change. Running my data on JBM, which I know is good, my load at 2895fps with the 140 AMAX is 7.9 mils at 50 degrees at 1000 yards. When I go up to 100 degrees it changes it to 7.6 mils. I have shot the H4350 loads from the teens to over 100 degrees with minimal chrono'd data shift.  Might be a tenth or two at 1000. That is from the ammo being in those conditions. Granted that is with H4350 and not the new powders being used but even if they were more there still wouldn't be a full mil shift.

HS-6 1.21fps per *
H110/W296 1.24 fps per *
Imr4227 1.17fps per *
Lil' Gun 1.31 fps per *
RL10x .71 fps per*
Benchmark .44 fps per *
Imr3031 .73 fps per *
Imr8208xbr .59 fps per *
H4895 .23 fps per *
Alliant Varmint pro .89 fps per *
Alliant AR comp .77 fps per *
Varget .19 fps per *
W748 1.32 fps per *
Imr4064 .53 fps per *
Ramshot Tac .91 fps per *
Imr4895 .87 fps per *
AA4064 1.11 fps per *
AA2520 .98 fps per *
RL15 1.52 fps per * from 50* and up
PP2000MR .99 fps per *
Imr4320 1.32 fps per *
Ramshot Biggame .98 fps per *
H380 1.44 fps per *
VV N150 1.08 fps per *
H414/W760 1.42 fps per *
Imr4350 .64 fps per *
AA4350 .47 fps per *
H4350 .29 fps per *
RL17 1.42 fps per *
Hybrid 100v .78 fps per *
RL19 1.61 fps per *
VV N160 1.24 fps per *
Imr4831 1.19 fps per *
Ramshot Hunter .86 fps per *
H4831 .36 fps per *
RL22 1.71 fps per *
Imr7828 1.36 fps per *
Magpro 1.01 fps per *
H1000 .21 fps per *
RL25 1.59 fps per *
Ramshot Magnum .87 fps per *
Retumbo .49 fps per *
RL33, still trying to get my data for this one.
US869 1.68 fps per *
H50bmg 1.64 fps per *

Thanks for posting this Rob1.

Terry

Rob01

No problem. I grabbed it off a post on Sniper's Hide and thought others here might be interested in the info.

Cold Trigger Finger

 What's the deal with IOR scopes.  Everything else I've heard is they are built seriously heavy duty  !
[mergedate]1432539249[/mergedate]
 I checked out your vids.  No doubt about the readings.  Just whether they are on.
 Why r u going to a NF scope? 
If your going to be a Bush Alaskan You need a perfect winter rifle. The Ruger M77 Hawkeye SS in 6.5 Creedmoor is mine.<br>You are being watched.

Jackson6.5

Buddy owns a gun shop and has good deal on a NF ATACR F1 5-25, going to be putting the 338 barrel on, found a place to shoot out to 1800 yards. After about 6-8 hours looking through The IOR I get eye fatigue and headaches, I ran a  borrowed NF for a few days and was okay, maybe the change in glass will help.
Also, you can believe what you want about ammo temp corrections, but I speak from my own personal data and people way smarter than me who teach ballistics functions, you will get large (36"-40") change in POI at 1000 yards with a 20* ammo and temp change depending on your cartridge and caliber selection obviously. But I'm here to learn, not argue, so that being said, I'll post the link to the video when I get to the range and shoot. Thanks for all the info guys.  Happy shooting and stay safe.

Rob01

Are those guys teaching military doctrine? If so then take it with a grain of salt. The military teaches all sorts of things that don't hold true. My team mate was a USMC sniper and he knows that quite well.

I have shot matches around the country in conditions from 20s to over 100 degrees and never had that huge of a swing from a 20 degree change in temp. I have worked up loads in 20 degree weather in Feb in CT and went down to TX and shot it in 90 degree whether then next month and data was right on from chrono and ballistic software. Not here to argue either as I know it's not the case from over 20 years of shooting long range.

You will be much happier with the NF scope. IOR scopes are always talked about as having great glass but their internals suck and usually have issues with tracking after using for a while. NF ATACR F1 will be a much better scope.

Jackson6.5

Thanks for the info. am looking forward to getting the Nightforce, I'm not bashing the IOR, it served its purpose well, and Val is a super nice guy. I'm going to sell the IOR Valdada if anyone is interested, its a 3-18x42 with the shade and lens covers

greasegun

Quote from: Rob01 on May 24, 2015, 08:18:59 AM20 degree temp change won't move impact a mil at 1000.  Look at the temps below for changes per degree. The most is 1.71 per degree. Using that and 20 degrees it comes out to about 34 degree change. Running my data on JBM, which I know is good, my load at 2895fps with the 140 AMAX is 7.9 mils at 50 degrees at 1000 yards. When I go up to 100 degrees it changes it to 7.6 mils. I have shot the H4350 loads from the teens to over 100 degrees with minimal chrono'd data shift.  Might be a tenth or two at 1000. That is from the ammo being in those conditions. Granted that is with H4350 and not the new powders being used but even if they were more there still wouldn't be a full mil shift.

HS-6 1.21fps per *
H110/W296 1.24 fps per *
Imr4227 1.17fps per *
Lil' Gun 1.31 fps per *
RL10x .71 fps per*
Benchmark .44 fps per *
Imr3031 .73 fps per *
Imr8208xbr .59 fps per *
H4895 .23 fps per *
Alliant Varmint pro .89 fps per *
Alliant AR comp .77 fps per *
Varget .19 fps per *
W748 1.32 fps per *
Imr4064 .53 fps per *
Ramshot Tac .91 fps per *
Imr4895 .87 fps per *
AA4064 1.11 fps per *
AA2520 .98 fps per *
RL15 1.52 fps per * from 50* and up
PP2000MR .99 fps per *
Imr4320 1.32 fps per *
Ramshot Biggame .98 fps per *
H380 1.44 fps per *
VV N150 1.08 fps per *
H414/W760 1.42 fps per *
Imr4350 .64 fps per *
AA4350 .47 fps per *
H4350 .29 fps per *
RL17 1.42 fps per *
Hybrid 100v .78 fps per *
RL19 1.61 fps per *
VV N160 1.24 fps per *
Imr4831 1.19 fps per *
Ramshot Hunter .86 fps per *
H4831 .36 fps per *
RL22 1.71 fps per *
Imr7828 1.36 fps per *
Magpro 1.01 fps per *
H1000 .21 fps per *
RL25 1.59 fps per *
Ramshot Magnum .87 fps per *
Retumbo .49 fps per *
RL33, still trying to get my data for this one.
US869 1.68 fps per *
H50bmg 1.64 fps per *

Where did this data come from?

Rob01

Quote from: greasegun on October 18, 2019, 04:58:15 PMWhere did this data come from?

Some testing. The data is all over the internet.

greasegun


Rob01

Quote from: greasegun on October 18, 2019, 05:39:09 PMSounds reliable

The sources are. Go look for them. I am not going to run around the internet doing your homework.

greasegun

Quote from: Rob01 on October 18, 2019, 06:51:45 PMThe sources are. Go look for them. I am not going to run around the internet doing your homework.

Fair enough.  Thanks.  I have seen this data on other forums just havent ever been able to find the source.