Anybody shoot a Barrett .50 BMG with the 20" barrel? We shoot a Barrett with a 29" barrel but looking for something that is a little more portable with a shorter barrel that Barrett makes. I am wondering how much velocity it will lose with the shorter barrel and will it really matter?
- Thread starter remington patriot
- Start date
Because you want that extra dose of concussive blast that the normal barrel doesn't quite give you enough of?
Hi,
In regards to "Will it really matter"...
That would depend on what your intended usage is and more importantly; your intended results of the usage.
Other than more portable....what are your requirements of the rifle?
Sincerely,
Theis
In regards to "Will it really matter"...
That would depend on what your intended usage is and more importantly; your intended results of the usage.
Other than more portable....what are your requirements of the rifle?
Sincerely,
Theis
I'm saying you'll lose at least a couple hundred FPS. Combine that with the downrange effects of lower velocity/energy as well as BC effects of having less gyroscopic stability, etc.
Hi,
Stability really would not be a factor, he could make that up from using a 10 twist.
What should also be mentioned in regards to ballistic performance changes is making sure it is understood that "good" ammo like Raufoss only goes boom when impacts while supersonic.
SO the usage distance of it will definitely be affected by going so short.
Sincerely,
Theis
Stability really would not be a factor, he could make that up from using a 10 twist.
What should also be mentioned in regards to ballistic performance changes is making sure it is understood that "good" ammo like Raufoss only goes boom when impacts while supersonic.
SO the usage distance of it will definitely be affected by going so short.
Sincerely,
Theis
You'll barely notice the weight difference in just the barrel. You'll still be in break it down and split the upper/lower between you and your partner and then play rock/paper/scissors on who carries the ammo, territory regardless of the 20 or 29 inch barrel.
If you're bringing a 50 you're after long distance while still achieving acceptable terminal ballistics. Barrel length = velocity = longer terminal ballistics threshold.
Otherwise, bring a different, lighter gun.
If you're bringing a 50 you're after long distance while still achieving acceptable terminal ballistics. Barrel length = velocity = longer terminal ballistics threshold.
Otherwise, bring a different, lighter gun.
You are not kidding, depending on the model, it's one heavy boat anchor, especially a kitted out M107
Then the ammo... sounds good till you want like 100 rounds HA!
Then the ammo... sounds good till you want like 100 rounds HA!
I had an 82A1 CQ. Like someone else said depends what you want it for. Accurate long range sniper platform NO!! Fuck shit up and be the cool guy at the range YES!! I now have an unfired 107A1 Military Deployment Kit that has the 29” barrel. Every gun lover should have a 50BMG IMO?!!
We can't have nice things in California.
This is some what incorrect. Raufoss will definitely detonate below supersonic velocities. The biggest variable is what sort of medium you’re impacting, soft soil at shallow angles while plugging at sub sonic speeds will decrease detonation, 50-70% on the lower end.
Regarding detonation effects on common material targeted for interdiction, I’ve seen pretty much near 100% detonation down to 700ish FPS.
Either way I’m going to guess this subject is probably outside the scope of what the OP is focused on. Most folks barring a narrow field of professional shooters don’t have the need/interest or financial ability to dabble in payload projectiles.
I've had plenty of time behind the 29" model and I usualy can shoot 20 rounds and it not effect me . I have only shoot the 20" model one time and after 4-5 rounds the percussion was so bad it opened all my sinuses and with every shot I took my nose was gushing loads of goo.
In summary, 20" is a tad too short for any practical usage where the 50 BMG would be deployed. It would work of course, but... why? Hell of a velocity drop.
You definitely won't be using the published BC for those with a 20" barrel.
750g AMAX for instance. Typical "factory" loaded specs.
20":
27":
You definitely won't be using the published BC for those with a 20" barrel.
750g AMAX for instance. Typical "factory" loaded specs.
20":
Rich (BB code):
**** Input data: Date: 29-Apr-2019 Time: 17:03:39
Cartridge................. = .50 BMG - 12.7mm x 99mm CIP
Projectile type........... = .510, 750, Hornady A-MAX UHC 5165 with boattail
Max.avg.pressure(Piezo CIP)= 53664 psi Shot start / init pressure = 3916 psi
Projectile weight (gr)= 750 Groove caliber (in)= 0.510
Length of cartridge (in)= 5.450 Length of case (in)= 3.900
Case capacity(Grains Water)= 300.00 Length of projectile (in)= 2.550
Length of barrel (in)= 20.000
**** Values calculated:
Seating depth (in)= 1.000 Volume displaced (gn H2O)= 49.29
Comb.chamber volume(gn H2O)= 250.71 Projectile travel (in)= 17.100
**** Input data:
Propellant type........... = Hodgdon 50BMG
Charge weight..........(gr)= 234.6 Load density......(g/cu.cm)= 0.934
Heat of Explosion (cal/lb)= 434445 Ratio of spec. heats cp/cv = 1.237
Solid density (gr/cu.in)= 397.0 Weighting factor...........= 0.5
Burning limit ......... z1 = 0.4 Combust.Chamber Vb(ft³)= 5.747876E-4
Factor.................. b = 1.732 X-S.Area of Bore A(ft²)= 1.395371E-3
Bulk density (gr/cu.in)= 236.2 Projectile mass mp (lb)= 1.071411E-1
Loading ratio (%)= 100.0 Projectile travel x(ft)= 1.425E+0
**** Results calculated:
Maximum pressure ........ = 69718 psi Way of projectile at Pmax = 2.43 in
Muzzle velocity ......Ve = 2530 fps Muzzle pressure .......Pe = 20150 psi
Project. energy at muzzle = 10661 ft.lbs Fraction of powder burnt = 97.5 %
Projectile travel time from 10% Pmax to muzzle = 1.17 ms27":
Rich (BB code):
**** Input data: Date: 29-Apr-2019 Time: 17:02:45
Cartridge................. = .50 BMG - 12.7mm x 99mm CIP
Projectile type........... = .510, 750, Hornady A-MAX UHC 5165 with boattail
Max.avg.pressure(Piezo CIP)= 53664 psi Shot start / init pressure = 3916 psi
Projectile weight (gr)= 750 Groove caliber (in)= 0.510
Length of cartridge (in)= 5.450 Length of case (in)= 3.900
Case capacity(Grains Water)= 300.00 Length of projectile (in)= 2.550
Length of barrel (in)= 27.000
**** Values calculated:
Seating depth (in)= 1.000 Volume displaced (gn H2O)= 49.29
Comb.chamber volume(gn H2O)= 250.71 Projectile travel (in)= 24.100
**** Input data:
Propellant type........... = Hodgdon 50BMG
Charge weight..........(gr)= 234.6 Load density......(g/cu.cm)= 0.934
Heat of Explosion (cal/lb)= 434445 Ratio of spec. heats cp/cv = 1.237
Solid density (gr/cu.in)= 397.0 Weighting factor...........= 0.5
Burning limit ......... z1 = 0.4 Combust.Chamber Vb(ft³)= 5.747876E-4
Factor.................. b = 1.732 X-S.Area of Bore A(ft²)= 1.395371E-3
Bulk density (gr/cu.in)= 236.2 Projectile mass mp (lb)= 1.071411E-1
Loading ratio (%)= 100.0 Projectile travel x(ft)= 2.008333E+0
**** Results calculated:
Maximum pressure ........ = 69718 psi Way of projectile at Pmax = 2.43 in
Muzzle velocity ......Ve = 2753 fps Muzzle pressure .......Pe = 14080 psi
Project. energy at muzzle = 12624 ft.lbs Fraction of powder burnt = 99.3 %
Projectile travel time from 10% Pmax to muzzle = 1.39 msHi,
The functional choice for a dedicated short barrel thumper is a 20x42, not a 50BMG if you ask me.
The 20x42 is designed pretty much specifically to achieve optimum performance in a 16 inch barrel system with average overall weight of entire rifle about 23 pounds.
Sincerely,
Theis
The functional choice for a dedicated short barrel thumper is a 20x42, not a 50BMG if you ask me.
The 20x42 is designed pretty much specifically to achieve optimum performance in a 16 inch barrel system with average overall weight of entire rifle about 23 pounds.
Sincerely,
Theis
I think a short 50 would be fine if you live in places where long shots aren't common and have it as the vehicle stopper weapon of your armory.
I would take a look at serbu. Much lighter. Much more accurate.
A guy on YouTube has both and goes over the differences
I would take a look at serbu. Much lighter. Much more accurate.
A guy on YouTube has both and goes over the differences
The CQ is purely a war horse. It is an anvil and built for chaos. Based on my experience, you will only lose a couple hundred feet when you transition to the 20" You realize it was designed for the Coast Guard? Yes, the CQ is quite accurate; we avg. 1MOA to 1.25MOA out to 400 yards. Yep, we do. And that's with 647gr ball. The CQ is by no means precision based, nor was it intended to be. I can say that I do trust my life with ALL BARRETT big weapons: 107, 82, 95 and 99 - not to mention the 98B and MRAD. All are proven and HARD. You want a precision .50bmg, then look at AI/Steyr/Cadex/McBros; heck, even the Bushmaster with the right hand load can be very accurate.
