[citation needed] The .41 Short Rimfire was created with the intention that it be used in a small, single-shot derringer, which likely is the reason for the very low ballistics (most derringers were and are chambered for cartridges that were not originally intended to be used in such a small weapon).

[2] He states that his testing showed the 130 grain bullet traveled at 621 feet per second (189 m/s) so producing 111 foot-pounds force (150 J) of energy - a significant difference in ballistic energy from the earlier tests.

The difference in findings can potentially be attributed to variances in the specific ammunition fired or measuring equipment used.

Moreover, in the guns Magazine's article "Henry Deringer’s Pocket Pistol" by John E. Parsons there is an interesting test to be read.

With the classic double-barreled Deringer with 3-inch barrels, two types of cartridges were fired, The old yellow-and-blue boxed Western Lubaloy, and a new batch of Brazilian, commissioned by Navy Arms; Both with the normal 130 gr bullet.