Louis was born and raised in Germany. He was trained as a master gunsmith at the technical academy system of pre World War II Germany. Luckily, he survived the war and more specifically, the Eastern Front, inside an elite Gebirgsjaeger (Mountain Troops) unit. He brought his family to the United States, through Canada, in 1959. From 1959 until his retirement in 1971, Louis was the gun designer for O.F. Mossberg.

In 1973, after a brief vacation of about two years, Louis founded the company named L.W. Seecamp Co., Inc. The family-owned and operated business specialized in Ludwig's patented double-action (DA) conversion of the immortal 1911 single-action (SA) semi-auto pistol. The public release of this conversion, right at the peak of the single-action versus double-action controversy, introduced the first commercially available .45 caliber DA semi-auto pistols anywhere in the world. From the early 1970s to the early 1980s, nearly 2000 of these SA to DA conversions were performed. Ludwig's inspiration for creating a DA conversion for the 1911 came from a personal experience during WWII. During a conflict that left him with a cheek-long scar and some missing teeth from a bullet wound, he was able to effectively defend himself using Walther P-38 (DA). This incident also led to his belief that point-shooting, as opposed to actually using the gun's sights, is more common during close range combat. Louis was certainly a big fan of the 1911 and an obvious advocate of DA carry, (so) it should come as no surprise that the commercial conversions were essentially reproductions of the original conversion that Ludwig created for his own DA Colt 45.

In 1979, L.W. Seecamp Co., Inc. introduced the telescoping recoil system that has become the most predominant spring system used by modern short-slide, short-recoil autoloaders. That same year, in the September/October issue of American Handgunner, in an article titled “The Rolls Royce of Bobcat .45s,” Mason Williams wrote, “This is such a major development in the field of automatic pistols that it could easily be considered the most significant development in a hundred years in the field.” This system was and, in some cases, is still in use by many popular handgun makers such as Glock, Colt, Kahr, Cylinder and Slide, Para-Ordnance, Lasermax, Kimber, Taurus, IM Metal, and Springfield Armory.

Another notable accomplishment of Ludwig's is his line of small defensive pistols. Introduced in 1981, the LWS .25 was an instant hit among those who desired a very small, yet reliable DA pocket gun. It was the world's first stainless steel DA-only pistol, as well as the first DA-only hammer-fired semi-auto made in the United States. In 1985, the LWS .25 was discontinued and replaced with the LWS .32. This larger caliber pistol didn't increase in size over the .25, which was considered an almost impossible task at the time. Despite the fact that the .32 caliber round was almost extinct, Ludwig managed to revive its popularity. Today, L.W. Seecamp Co., Inc. still produces the LWS .32 and the .380 version, the LWS .380.