Hello all. I am new here. A few weeks ago I didn't even know the 6.5 Grendel existed. I am not even sure how I stumbled across it, but I did, and I now have a HOWA mini action showing up in about a week. I thought this would be a fun project to build a very light deer rifle for myself and my kids to use in a few years when they get big enough. The Grendel seemed perfect for a low recoil deer gun for my kids.
I feel like I have read a lot of conflicting info on barrel length. So here is the research I put together. I pulled data from VASCAR2's post about barrel lengths and speed. I know there are plenty of conflicting theories about how to determine lethality on deer. I know all those theories have flaws but at some point, you just have to choose one and use it to compare the data. Which is what I did, using the Chuckhawks.com Killing Power Score (Energy x Sectional Density x Cross-sectional Area) according to their interpretation anything over a 15 is good for Deer, while 12 is "sufficient" for most deer. For ease of use with my kids, I would also consider a 6" Maximum point-blank range as a limiting factor as well. I don't want to be trying to worry about adjusting scopes or trying to explain hold points to them when there is a deer in their scope.
Here is my data (123gr SST):
24"
MPBR - 257 yards
KPS 15+ - 350yds
20"
MPBR - 251 yards
KPS 15+ - 325 yards
18"
MPBR - 250 Yards
KPS 15+ - 300 yards
16"
MPBR - 244 yards
KPS 15+ - 275 yards
So my take away is that while there is some velocity loss in shortening the barrels, the end result when hunting deer is negligible. 24" to 16" only loses you 1 yards of MPBR and your killing power still exceeds the MPBR yardage. So really it is a simple deer shooter to 250 yards whether it is wearing a 24" barrel or a 16" one.
Am I looking at this right? Do any of you disagree strongly?
I feel like I have read a lot of conflicting info on barrel length. So here is the research I put together. I pulled data from VASCAR2's post about barrel lengths and speed. I know there are plenty of conflicting theories about how to determine lethality on deer. I know all those theories have flaws but at some point, you just have to choose one and use it to compare the data. Which is what I did, using the Chuckhawks.com Killing Power Score (Energy x Sectional Density x Cross-sectional Area) according to their interpretation anything over a 15 is good for Deer, while 12 is "sufficient" for most deer. For ease of use with my kids, I would also consider a 6" Maximum point-blank range as a limiting factor as well. I don't want to be trying to worry about adjusting scopes or trying to explain hold points to them when there is a deer in their scope.
Here is my data (123gr SST):
24"
MPBR - 257 yards
KPS 15+ - 350yds
20"
MPBR - 251 yards
KPS 15+ - 325 yards
18"
MPBR - 250 Yards
KPS 15+ - 300 yards
16"
MPBR - 244 yards
KPS 15+ - 275 yards
So my take away is that while there is some velocity loss in shortening the barrels, the end result when hunting deer is negligible. 24" to 16" only loses you 1 yards of MPBR and your killing power still exceeds the MPBR yardage. So really it is a simple deer shooter to 250 yards whether it is wearing a 24" barrel or a 16" one.
Am I looking at this right? Do any of you disagree strongly?
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