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Author Topic: Point Blank Range  (Read 615 times)

Offline Dutch-Hunter

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Point Blank Range
« on: January 21, 2018, 08:40:59 AM »
What is “Point Blank Range (PBR),” and what does it mean? Defined, point blank range is the range at which you don’t need to aim high or low to hit your aiming point. Maximum Point Blank Range (MPBR) is simply the farthest end of that distance or true zero range.

Here's the opening of this article. I could not get the article to format got an server error message. I've attached in PDF.

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Offline Zos41

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Re: Point Blank Range
« Reply #1 on: January 21, 2018, 11:59:45 AM »
Good info and a good refresher DH, thank you for posting the link
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Offline King Ben

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Re: Point Blank Range
« Reply #2 on: January 21, 2018, 12:09:12 PM »
I always considered point blank as "being at the end of your barrel" or so close you do not need to use sights (just point and shoot).

Offline Madgomer

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Re: Point Blank Range
« Reply #3 on: January 21, 2018, 12:48:15 PM »
Dutch - there's a couple of glitches in their table.  They start out saying that on a deer, the kill zone is about 6" high for heart/lung - I agree with that.  But in their table they claim MPBR is 280 with a trajectory that goes 6" above the line of sight & 9" below at 280.  That would be true if you had a 15" kill zone to work with, but MPBR in that trajectory curve is quite a bit less than 280 if you're pursuing something with a 6" kill zone. 

I've been playing around trying to work out my MPBR for coyotes with my AR, but struggling to find consistent info for the kill zone on a yote - would be curious how big you guys think it is.  I know I have at least 200 yards, so should probably just be satisfied given that I probably won't ever have a shot that far around here.
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Offline Dutch-Hunter

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Re: Point Blank Range
« Reply #4 on: January 22, 2018, 06:03:48 AM »
Mag you're right the far PBR should be 265.

Here's a PBR for a 50gr 224 pill pushed at 3200. I used a 4" vitals zone which I've always used for yotes.

Drag Function: G1
Ballistic Coefficient: 0.242
Initial Velocity: 3200 fps
Sight Height : 1.5 in
Target Size: 4 in

Near Zero:   32 yards
Far Zero:   214 yards
Minimum PBR:   0 yards
Maximum PBR:   249 yards
Sight-in at 100yds:     1.8" high
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Offline BoBallistic

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Re: Point Blank Range
« Reply #5 on: January 22, 2018, 05:24:54 PM »
http://www.talkhuntin.com/index.php?topic=39623.msg628845#msg628845

I posted this back in 2014. It is a old 1983 Outdoor Life Article that is from that era. It made up of the most popular calibers of the day and it compares to each other. There is not a lot of difference between all of them...but that was way back when...some of the calibers apply today and some don't, just enjoy a walk from the past. The article parameters are a 6 inside diameter pipe. The bullet cannot rise more than 3" above bore and drop no more than 3"....

Today things are much different, BC has gotten better, computer analysis has change the world, back in 83 there was computers but it was DOS days back then, no cell phones, no apps, no nothing, I was the remote growing up...LOL....

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Offline Madgomer

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Re: Point Blank Range
« Reply #6 on: January 22, 2018, 06:00:28 PM »
Thanks for the reference point DH.  With my two favorite loads on my AR I'm at about 225 MPBR using a 4" kill zone.  My scope sits 2 & 7/8" above the bore so technically I'm off a little on the up close & personal shots, but I'll accommodate those rare occasions with a little manual adjustment. 

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Offline Gutshot

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Re: Point Blank Range
« Reply #7 on: January 22, 2018, 06:07:26 PM »
Thanks for the reference point DH.  With my two favorite loads on my AR I'm at about 225 MPBR using a 4" kill zone.  My scope sits 2 & 7/8" above the bore so technically I'm off a little on the up close & personal shots, but I'll accommodate those rare occasions with a little manual adjustment. 

 ()*$%RT
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Offline Madgomer

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Re: Point Blank Range
« Reply #8 on: January 22, 2018, 07:12:04 PM »
Thanks for the reference point DH.  With my two favorite loads on my AR I'm at about 225 MPBR using a 4" kill zone.  My scope sits 2 & 7/8" above the bore so technically I'm off a little on the up close & personal shots, but I'll accommodate those rare occasions with a little manual adjustment. 

 ()*$%RT
More commonly known as KW ( Kentucky Windage )  --099-780
Yeah Gutshot, I actually had that typed, but then realized "wait, it's elevation, not windage" so tried something different to avoid the wrath of Dutch.  I hear he's like those nuns in the Catholic schools & likes to smack us kids across the knuckles with a ruler when we screw up!
One of God's greatest gifts to us is
the great outdoors - get out there
and enjoy it!

Offline yari

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Re: Point Blank Range
« Reply #9 on: January 22, 2018, 07:19:26 PM »
classic john wayne 'windage and elevation'. -0078
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Offline Dutch-Hunter

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Re: Point Blank Range
« Reply #10 on: January 23, 2018, 04:51:19 AM »
Thanks for the reference point DH.  With my two favorite loads on my AR I'm at about 225 MPBR using a 4" kill zone.  My scope sits 2 & 7/8" above the bore so technically I'm off a little on the up close & personal shots, but I'll accommodate those rare occasions with a little manual adjustment. 

 ()*$%RT
More commonly known as KW ( Kentucky Windage )  --099-780
Yeah Gutshot, I actually had that typed, but then realized "wait, it's elevation, not windage" so tried something different to avoid the wrath of Dutch.  I hear he's like those nuns in the Catholic schools & likes to smack us kids across the knuckles with a ruler when we screw up!

Kneeling on pencils is my fav punishment.  >:( Just so you know I wasn't even going to bring up "windage". But now that that cat is outa da bag get ready for next installment.  @--0--0104  @--0--0117
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