I have several articles about the utility of short barrel rifles but most of them are focused on small cartridges like 9mm, .22 LR, .300 Blackout and .357 Magnum. While other loading are discussed I recently came across a premium hunting rifle manufacturer offering 12.5 inch barrel bolt action rifles then found another in the 13 inch range. They offer the rifle in the 3 Creedmoor loadings with one offering .308 Winchester and 6mm ARC. I immediately pondered if the performance would be worth anything.
After doing some research, I can say that I am fully on board with this idea but there are several caveats. That said, I started looking into incorporating such a build into our inventory and if it would make sense to do so.
The short answer is, if I was willing to spend a bunch of money, I could build a nice little rifle for use out to 200 yards to hunt whitetail (my favorite go to benchmark animal). I would like to go over the caveats first.
Fierce Firearms claims they achieve 2500 fps from their Wingman SBR using their in-house custom ammo using a Hornady ELD-M 140 grain bullet in 6.5 Creedmoor. That combined package is likely still usable out to 300 yards if you know your bullet's drop. The problem is that this is custom ordered ammunition using a very expensive rifle. That's not in the range of normal for an average hunter.
Can we do something similar on a budget? Let's mull over this thought experiment. Here are my requirements: 12 to 13 inch barrel, inexpensive ammunition, 200 yards effective range, short action cartridge (I don't see going to .270 or 30-06 for this).
The rifle can be whatever you want. If you want to cut down a Savage Axis or buy a pre-made pistol and build it out, feel free. Most factory ammo like the Federal blue box or Winchester Power Points aren't likely going to be at the velocity level needed to achieve what I'm looking for.
Digging up good data on velocities can be tricky. Most of everything is specifically AR-10 rifles with 12.5 barrels using range ammo not hunting ammo. So far, a 150 grain .308 Winchester load will likely be around 2300 fps. If we use Federal's Fusion Tipped load for the benchmark, it looks like 2300 fps gets to 156 yards before the velocity drops down to 2000 fps. For reference, 2000 fps is a generally accepted minimum velocity for bullet performance in hunting. Interestingly, the drop with a 100 yard zero is under 3 inches. That's actually pretty great. If 2300 is not correct and the velocity is more like 2250 fps, then we're looking at 130 yards. Unfortunately, we're looking at 1875 fps at the 200 yard mark. I don't know if the bullet works well at those velocities.
If we switch from .308 Winchester to 6.5 Creedmoor, we can at least pick up a higher ballistic coefficient bullet but finding accurate velocity data has become hard to do. The closest I have been able to dig up was a young man showing around 2250 fps with what appears to have been American Gunner 140 grain range ammo. Let's just take that as cannon and select good bullets.
The Hornady ELD-X bullet has a very high BC at .623 G1 and is available in the Precision Hunter loading. If being launched at 2250 fps, that ELD-X will hit 2000 fps around 197 yards and is just about 6 inches down with a 100 yard zero. That is so close to what I'm looking for, it's silly. But wait, there's more.
I've been keeping an eye on .25 Creedmoor since it came out. It's just a .257 caliber bullet in the Creedmoor algorithm that a group of West Virginians developed. You had me at West Virginia but quarter bore is just interesting. It's mostly an exercise in splitting hairs to achieve just a little better performance. Most new hunters could have adopted the 6.5 CM and never needed anything else. As it were, we're splitting hairs here.
If we assume again a 2250 fps (It's likely that we would see a higher velocity due to the lighter bullet weight) and a that we stick with the ELD-X but now have a BC of .633, we achieve 2000 fps right at 200 yards. The calculator also says that we are 6.2 inches down with a 100 yard zero.
Looks like we may have our winner but we should try to validate this first. Going back to Fierce Firearm's webpage for the Wingman SBR, we see they are claiming 2720 to 2725 fps with a 110 grain Nosler in their custom loaded DirtNap ammo. It's $80 for a box of 20 rounds. Not really a good comparison. So maybe we aren't able to verify what we have.
6mm Creedmoor and .22 Creedmoor are pretty much going to be ballparking with higher velocities but with worse BC's. I suspect that the factory Hornady loading with the ELD-X. I reran the calculator for the 6mm CM with a 103 ELD-X but for 2300 fps and it's just about the same as the 6.5mm.
I would like to revisit this once the 25 CM has more factory ammo options and more data available. Rifle options will need to show up as well. Currently, I suspect that the .25 CM is the sweet spot for what I'm thinking on for the build. My reasoning is that the .257 caliber appears to balance expansion diameter and penetration with our needed velocity. Big Game Hunting Blog has completed Hornady ammo gel testing for .22, .25, 6mm and 6.5mm Creedmoor with the .25 CM showing good expansion and penetration while staying in the velocity window. However, the issue falls to is this practical and does it benefit me and the family to chase this down?
From a practical stand point, the answer is yes. The typical East Coast hunting distances are achieved with the worst case velocities. There is ammunition available and more coming online soon, though not wide spread. The rifle would be very short (which you'll want) for woods work. If a 20 inch Winchester model 94 is a good woods gun at 38 inches over-all length, this concept will do fine even with an 8 inch suppressor. Top the build with a 1-8x scope and I figure you'll have a very useable and handy rifle.
To reiterate, I suspect that I am under-playing the 2250 fps velocity for the .25 Creedmoor from a 12.5 inch barrel. If that's the case, the distance is just going to be further and the gun more usable than what I've suggested here. But what's also interesting is that all of the short action cartridges have some sort of useable velocity envelope that a hunter looking for this sort of build could go for. The .308 Winchester version still functions in many distances that lots of hunters find themselves in. I would argue that the only short action cartridges you shouldn't use would be .243 Winchester, 6mm Creedmoor and .22 Creedmoor. I think they need all the velocity they can get for deer hunting given their bullet diameter and the final expansion diameters that gel testing shows. Most factory loads are achieving under half an inch and I think if I'm building this, I should push for a larger hole and deeper penetration. I prefer over final diameter to be over .55 inch with penetration over 18 inches.
This was a fun though experiment and I look forward to seeing what the next several years look like for the firearms world.



