So I did some number crunching and the results surprised me…
I had originally assumed that 10mm was the superior “woods gun” caliber as per the various internet experts. So I bought a G29 SF with that in mind thinking it would make for a great compact bear defense gun when hiking on the Appalachian trail 1-2 times a year. I had also assumed that for .45 to compete with the 10mm in this role, I would have to go up to the .45 Super cartridge.
I don’t hand load so Buffalo Bore is my go to for hard-cast loadings in all calibers.
Comparing my G30S to G29SF:
1.) Loaded Weight
G29 SF = 32.80 oz
G30S = 30.16 oz
The G29 weighs almost 3 oz more but has 10% more capacity in the gun and 20% more capacity on the reload. A dubious benefit for a woods gun. Am I underestimating this capacity advantage?
2.) Energy (Buffalo Bore Hard Cast)
G29 w/ 220 gr HC = 591 ft/lbs
G30S w/ 255 gr +P HC = 511 ft/lbs
The G29 produces 80 ft/lbs more energy at the muzzle. I think this is largely inconsequential
3.) Muzzle Velocity (BB HC)
G29 w/ 220 gr HC = 1,100 fps
G30S w/ 255 gr HC = 950 fps
The G29 produces 150 fps more velocity at the muzzle.
I don’t think this is much of a real world benefit for a woods self defense handgun. For a hunting handgun having to place a shoot at 100 + yards (ethically?) I could perhaps see some benefit to the 10mm particularly in the G40 MOS.
4.) Sectional Density
.401/220 grains SD .189
.45255 grains SD .180
Factoring in ballistic/terminal performance, the 220gr HC 10mm has a slightly higher SD, 80 more ft lbs of energy and 150 fps more at the muzzle.
5.) Momentum
This is what I found surprising. The 255 gr HC .45 +P has 35 grains more projectile weight and very, very slightly more momentum hardly measurable or worth mentioning. Virtually the same but I expected the 10mm to have quite a bit more.
10mm 220 gr = 73.76 kg*m/s
.45 +P 255 gr = 73.83 kg*m/s
Conclusion
I think the 10mm may be overestimated as a woods self defense handgun cartridge and the .45 ACP +P is certainly underestimated. Between the two Hard-Cast loads, I believe the 255 grain +P has a slight advantage over 200/220 grain 10mm within this role at typical self defense distance.
What do you guys think? Thanks for taking the time to read and I look forward to reading your opinions contrary or otherwise.
I had originally assumed that 10mm was the superior “woods gun” caliber as per the various internet experts. So I bought a G29 SF with that in mind thinking it would make for a great compact bear defense gun when hiking on the Appalachian trail 1-2 times a year. I had also assumed that for .45 to compete with the 10mm in this role, I would have to go up to the .45 Super cartridge.
I don’t hand load so Buffalo Bore is my go to for hard-cast loadings in all calibers.
Comparing my G30S to G29SF:
1.) Loaded Weight
G29 SF = 32.80 oz
G30S = 30.16 oz
The G29 weighs almost 3 oz more but has 10% more capacity in the gun and 20% more capacity on the reload. A dubious benefit for a woods gun. Am I underestimating this capacity advantage?
2.) Energy (Buffalo Bore Hard Cast)
G29 w/ 220 gr HC = 591 ft/lbs
G30S w/ 255 gr +P HC = 511 ft/lbs
The G29 produces 80 ft/lbs more energy at the muzzle. I think this is largely inconsequential
3.) Muzzle Velocity (BB HC)
G29 w/ 220 gr HC = 1,100 fps
G30S w/ 255 gr HC = 950 fps
The G29 produces 150 fps more velocity at the muzzle.
I don’t think this is much of a real world benefit for a woods self defense handgun. For a hunting handgun having to place a shoot at 100 + yards (ethically?) I could perhaps see some benefit to the 10mm particularly in the G40 MOS.
4.) Sectional Density
.401/220 grains SD .189
.45255 grains SD .180
Factoring in ballistic/terminal performance, the 220gr HC 10mm has a slightly higher SD, 80 more ft lbs of energy and 150 fps more at the muzzle.
5.) Momentum
This is what I found surprising. The 255 gr HC .45 +P has 35 grains more projectile weight and very, very slightly more momentum hardly measurable or worth mentioning. Virtually the same but I expected the 10mm to have quite a bit more.
10mm 220 gr = 73.76 kg*m/s
.45 +P 255 gr = 73.83 kg*m/s
Conclusion
I think the 10mm may be overestimated as a woods self defense handgun cartridge and the .45 ACP +P is certainly underestimated. Between the two Hard-Cast loads, I believe the 255 grain +P has a slight advantage over 200/220 grain 10mm within this role at typical self defense distance.
What do you guys think? Thanks for taking the time to read and I look forward to reading your opinions contrary or otherwise.