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Chronographed my Henry loads

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TNman
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Chronographed my Henry loads

Post by TNman » Mon Sep 17, 2018 11:14 pm

Got out my chronograph and checked my hunting loads in my BBSC .357 and .41 mag.
The .357 is loaded with 180g Hornady XTP bullets over Lil’Gun powder and the velocity averaged 1410 fps. I was figuring it would be a bit faster but that’s what it showed.
The .41 was loaded with 210g xtps over Lil’Gun and it is smoking right along at 1795 fps . That should work for TN whitetails.
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GunnyGene
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Re: Chronographed my Henry loads

Post by GunnyGene » Tue Sep 18, 2018 7:05 am

TNman wrote:Got out my chronograph and checked my hunting loads in my BBSC .357 and .41 mag.
The .357 is loaded with 180g Hornady bullets over Lil’Gun powder and the velocity averaged 1410 fps. I was figuring it would be a bit faster but that’s what it showed.
The .41 was loaded with 210g xtps over Lil’Gun and it is smoking right along at 1795 fps . That should work for TN whitetails.
Thanks for posting that. I was expecting right around that for mine for the 210gr .41 just working the numbers for the carbine barrel, but hadn't actually gotten around to borrowing a chrono yet. Guestimate was 1810fps based on 1560fps out of a 6.5" Ruger. :)
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JEBar
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Re: Chronographed my Henry loads

Post by JEBar » Tue Sep 18, 2018 7:22 am

nicely done .... both should do the job .... we use 158 gr in our 357, this is the first time I've seen actual numbers on 180 gr'ers .... the 41was really impressive .... don't know if you have a ballistics program to feed your data into so as to know the trajectory of your bullets .. :?: .. if not, here is a link to the one we use .... at first glance it looks complicated but you don't need to fill in anywhere near all of the blanks

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
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Re: Chronographed my Henry loads

Post by GunnyGene » Tue Sep 18, 2018 8:20 am

JEBar wrote:nicely done .... both should do the job .... we use 158 gr in our 357, this is the first time I've seen actual numbers on 180 gr'ers .... the 41was really impressive .... don't know if you have a ballistics program to feed your data into so as to know the trajectory of your bullets .. :?: .. if not, here is a link to the one we use .... at first glance it looks complicated but you don't need to fill in anywhere near all of the blanks

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
Should get about 3" drop and around 900 ftlbs at 100yds, depending on the weather. I use the Hornady calc. https://www.hornady.com/team-hornady/ba ... lculators/#!/
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Re: Chronographed my Henry loads

Post by JEBar » Tue Sep 18, 2018 9:30 am

thanks for the link .... I've bookmarked it
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Re: Chronographed my Henry loads

Post by Slugnut » Tue Sep 18, 2018 2:23 pm

TNman, remember, the max velocity for the 210g XTPs is 1450fps as per the Hornady reloading, 8th ed. You might not get the penetration you expect, the bullet might even fragment on contact. Keep us posted on how you make out and good luck. PS, I spoke to a Hornady rep about the factory specs. posted on a factory box of 210g XTPs. ( those are pistol specs he said) . I said if they are fired from a rifle, you'll be over the max velocity for those bullets and he agreed and wondered himself. Rule of thumb- +/- 300fps. for rifle velocities.
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Re: Chronographed my Henry loads

Post by Ojaileveraction » Tue Sep 18, 2018 4:01 pm

Slugnut wrote:TNman, remember, the max velocity for the 210g XTPs is 1450fps as per the Hornady reloading, 8th ed. You might not get the penetration you expect, the bullet might even fragment on contact. Keep us posted on how you make out and good luck. PS, I spoke to a Hornady rep about the factory specs. posted on a factory box of 210g XTPs. ( those are pistol specs he said) . I said if they are fired from a rifle, you'll be over the max velocity for those bullets and he agreed and wondered himself. Rule of thumb- +/- 300fps.
The Terminal Ballistics Research website gives very detailed real world (as in hunting situations) studies on the terminal ballistcs of many calbers and cartridges. He discusses the history, available over the counter ammo and reloading. All the time giving details on wound channels, downing, and poi choices.

https://www.ballisticstudies.com/Knowledgebase.html

Here is one paragraph:
In contrast to the lighter weight bullets, the 180 grain XTP produces very fast killing from a rifle out to ranges of around 75 yards (1450fps). If hit through vitals, animals do not move far and move off either in a drunken manner or bunched up, showing the hunter an indication of a solid hit. As ranges exceed 100 yards (1350fps in rifles and now heading towards pistol velocities) kills can be slightly delayed and game hit through vitals tend to move off slowly then succumb in a drunken manner. As the XTP (and others) approach 1000fps performance tapers off further. In order to cause rapid killing, the hunter must keep shots well forwards and try to break bone.
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TNman
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Re: Chronographed my Henry loads

Post by TNman » Tue Sep 18, 2018 10:01 pm

Yeah Slugnut I never thought about shooting them at too high a velocity out of a carbine. I will see what happens...hopefully there will be several deer to evaluate their performance. Looking at the box it does say for velocities between 700 and 1500 fps.
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Re: Chronographed my Henry loads

Post by JEBar » Tue Sep 18, 2018 11:30 pm

it might be worth running your loads through a ballistics program that gives you the drop in speed as the bullet goes down range .... most revolver ammo isn't aerodynamic which causes them to lose speed relatively quickly .... the numbers that really need to be considered are the bullet's speed at the distances a person anticipates shooting
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Re: Chronographed my Henry loads

Post by GunnyGene » Wed Sep 19, 2018 7:39 am

JEBar wrote:it might be worth running your loads through a ballistics program that gives you the drop in speed as the bullet goes down range .... most revolver ammo isn't aerodynamic which causes them to lose speed relatively quickly .... the numbers that really need to be considered are the bullet's speed at the distances a person anticipates shooting
This is what the Hornady program spit out for me. MV is estimated and could be +/-50fps. 16.5" barrel, 1:18 twist. BC (G1) is from Hornady for .41 mag, 210gr XTP.

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