nitesite
Member
Per the esteemed Jim March's suggestion in another thread here, I did some chronograph testing this afternoon of Cor-Bon DPX 110-gr .38 Special +P ammunition.
The impetus behind his suggestion was because I have had less-than-satisfactory expansion results when I have shot this ammo thru my S&W no-dash 442 2" J-Frame. Jim surmised that I may have a "slow gun" for this particular round, even if it performs well with other brands of ammunition.
So here are the findings and observations I came up with.
First, I assembled five factory .38 Special loads, all rated +P and ranging in weight from 110-grains thru 158-grains. I also added one of my own handloads, 148-gr hard cast BBDEWCs made by Leadheads over 3.8 grains of Titegroup and Federal 100 primers.
First, I soaked the bore and chambers with Kroil then followed up 30-minutes later with a brush and dry patches until everything was clean and dry.
Since we suspected that the DPX bullet might be a sub-performer I selected to shoot them as the first string out of my 442 with the barrel cold. I figured that as things warmed up the velocities might slow down a bit and I wanted to give the DPX it's best run down the barrel.
Chrono data was taken at six feet from muzzle, 669' ASL, 81° Fahrenheit.
I worked thru the various strings with the lightest bullets first because they are either all-copper, Nyclad, or jacketed and I believed that therefore they would not contribute to leading of the barrel. The first lead bullet was the Georgia Arms 158-gr LSWCHP, since their lead is harder than the Remington 158-gr LSWC. The last string was with my handload which is just a standard pressure .38 Special load at lower velocities.
In the second photo you can see the order I chose from L→R for the various strings:
110 DPX +P, Federal Nyclad 125 +P, Gold Dot 135 +P, GA 158 +P, Remington 158 +P and my standard velocity WC load.
So here are the velocity results. Every string was five shots each, and I had good light so there were no errors.
As Jim surmised, the all-copper DPX bullet apparently does not like my gun. Advertised velocities on the box are 1300-fps but all my 2" gun could muster was an average 922-fps.
The entire test showed average velocities that differed by a mere 160-fps, with the Georgia Arms load coming in the slowest. I really thought there would be more than 140-fps difference between my handload WC and the DPX!
The GA load really belched smoke when fired, and there was quite a lot of it. But look at those ES/SD numbers!!!
The Gold Dot load was the only one to show any unburned powder, and it was like yellow-gold flakes not ash or small burned particles.
Remington really made their load amazingly consistent, didn't they?
What surprised me the most about the NyClad load was its sharp recoil. Perhaps it's because I haven't shot any factory ammo from this gun in a while, and I tend to stay with heavier and slower bullets than a 125-gr +P HP. I didn't care for the recoil pulse that I experienced when shooting it.
So thanks, everyone, for taking the time to wade thru all this mess. If you have any comments or suggestions you are always welcome to make them.
Now I guess I'll just shoot up the last of the DPX ammo and harvest the brass. I never was much of a proponent for lightweight bullets from a .38 Special anyway, and now I'm convinced that my little 442 doesn't care for them much either.
Bye, Y'all... Enjoy your weekend!
nitesite
The impetus behind his suggestion was because I have had less-than-satisfactory expansion results when I have shot this ammo thru my S&W no-dash 442 2" J-Frame. Jim surmised that I may have a "slow gun" for this particular round, even if it performs well with other brands of ammunition.
So here are the findings and observations I came up with.
First, I assembled five factory .38 Special loads, all rated +P and ranging in weight from 110-grains thru 158-grains. I also added one of my own handloads, 148-gr hard cast BBDEWCs made by Leadheads over 3.8 grains of Titegroup and Federal 100 primers.
First, I soaked the bore and chambers with Kroil then followed up 30-minutes later with a brush and dry patches until everything was clean and dry.
Since we suspected that the DPX bullet might be a sub-performer I selected to shoot them as the first string out of my 442 with the barrel cold. I figured that as things warmed up the velocities might slow down a bit and I wanted to give the DPX it's best run down the barrel.
Chrono data was taken at six feet from muzzle, 669' ASL, 81° Fahrenheit.
I worked thru the various strings with the lightest bullets first because they are either all-copper, Nyclad, or jacketed and I believed that therefore they would not contribute to leading of the barrel. The first lead bullet was the Georgia Arms 158-gr LSWCHP, since their lead is harder than the Remington 158-gr LSWC. The last string was with my handload which is just a standard pressure .38 Special load at lower velocities.
In the second photo you can see the order I chose from L→R for the various strings:
110 DPX +P, Federal Nyclad 125 +P, Gold Dot 135 +P, GA 158 +P, Remington 158 +P and my standard velocity WC load.
So here are the velocity results. Every string was five shots each, and I had good light so there were no errors.
As Jim surmised, the all-copper DPX bullet apparently does not like my gun. Advertised velocities on the box are 1300-fps but all my 2" gun could muster was an average 922-fps.
The entire test showed average velocities that differed by a mere 160-fps, with the Georgia Arms load coming in the slowest. I really thought there would be more than 140-fps difference between my handload WC and the DPX!
The GA load really belched smoke when fired, and there was quite a lot of it. But look at those ES/SD numbers!!!
The Gold Dot load was the only one to show any unburned powder, and it was like yellow-gold flakes not ash or small burned particles.
Remington really made their load amazingly consistent, didn't they?
What surprised me the most about the NyClad load was its sharp recoil. Perhaps it's because I haven't shot any factory ammo from this gun in a while, and I tend to stay with heavier and slower bullets than a 125-gr +P HP. I didn't care for the recoil pulse that I experienced when shooting it.
So thanks, everyone, for taking the time to wade thru all this mess. If you have any comments or suggestions you are always welcome to make them.
Now I guess I'll just shoot up the last of the DPX ammo and harvest the brass. I never was much of a proponent for lightweight bullets from a .38 Special anyway, and now I'm convinced that my little 442 doesn't care for them much either.
Bye, Y'all... Enjoy your weekend!
nitesite
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