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Many people have expressed that the feed reliability is diminished when utilizing a full magazine (10 rounds) with the +1 extension installed.
I occassionally had this difficulty when utilizing the .40 S&W barrel and hollow point ammunition. I felt that it was less of an issue when utilizing the .357 Sig barrel because the necked cartridge case allowed easier feeding. Therefore, I dedicated my P-40 to a P-357 for carry use. (I still like the ballistics and recoil of the .357 Sig better)
However, after taking delivery of a stock of the Cor-bon Pow'Rball ammunition in .40 S&W (intended for use in my Steyr M-40), I decided to revisit the feed problems with the KT P-40.
I reinstalled the .40 S&W barrel in my P-40 and decided to conduct a test at the range today. I loaded the magazine with the +1 extension completely, chambered a round -- then removed the magazine an filled the void from the chambered cartridge and reinserted the magazine. This would be my "normal" concealed carry configuration (10 +1 rounds).
I went through this process and fired one round. The cycling of the spent case and picking up of the fresh round from a full +1 magazine is where I had feeding problems before. It was never an issue with only 9 rounds in the magazine.
I performed this evolution 10 times with Cor-bon 135 gr hollow point ammunition. Two times out of the ten, I had a failure to feed -- with the top round in the full +1 magazine nosing down into the bottom of the feed ramp. So, a 20% failure rate -- 80% reliability.
I then fired 10 evolutions of the Cor-bon 135 gr Pow'Rball in the same fashion as described above. ZERO failures to feed from the full magazine with +1 extension installed! 100% reliability.
So, my conclusion is that the use of the Pow'Rball ammunition (with it's "FMJ ball" profile) in a full +1 magazine out of a P-40 may reduce any failure to chamber/feed issues that have been experienced by other owners.
Ballistic tests of this ammunition shows excellent expansion, penetration and weight retention. The Pow'Rball will become my primary concealed carry load in the .40S&W, .357 Sig, and.....when released, the .380 Auto for the P-3AT.
I occassionally had this difficulty when utilizing the .40 S&W barrel and hollow point ammunition. I felt that it was less of an issue when utilizing the .357 Sig barrel because the necked cartridge case allowed easier feeding. Therefore, I dedicated my P-40 to a P-357 for carry use. (I still like the ballistics and recoil of the .357 Sig better)
However, after taking delivery of a stock of the Cor-bon Pow'Rball ammunition in .40 S&W (intended for use in my Steyr M-40), I decided to revisit the feed problems with the KT P-40.
I reinstalled the .40 S&W barrel in my P-40 and decided to conduct a test at the range today. I loaded the magazine with the +1 extension completely, chambered a round -- then removed the magazine an filled the void from the chambered cartridge and reinserted the magazine. This would be my "normal" concealed carry configuration (10 +1 rounds).
I went through this process and fired one round. The cycling of the spent case and picking up of the fresh round from a full +1 magazine is where I had feeding problems before. It was never an issue with only 9 rounds in the magazine.
I performed this evolution 10 times with Cor-bon 135 gr hollow point ammunition. Two times out of the ten, I had a failure to feed -- with the top round in the full +1 magazine nosing down into the bottom of the feed ramp. So, a 20% failure rate -- 80% reliability.
I then fired 10 evolutions of the Cor-bon 135 gr Pow'Rball in the same fashion as described above. ZERO failures to feed from the full magazine with +1 extension installed! 100% reliability.
So, my conclusion is that the use of the Pow'Rball ammunition (with it's "FMJ ball" profile) in a full +1 magazine out of a P-40 may reduce any failure to chamber/feed issues that have been experienced by other owners.
Ballistic tests of this ammunition shows excellent expansion, penetration and weight retention. The Pow'Rball will become my primary concealed carry load in the .40S&W, .357 Sig, and.....when released, the .380 Auto for the P-3AT.