TRSR8,
You are familiar with a Ballard, correct? It's a single shot rifle originally designed and patented by Charles H. Ballard in 1861 or there abouts. For those in the single shot vintage rifle game it's very common. I'm guessing you're quite familiar.
The Ballard is originally a external hammer configuration, until a guy by the name of George Worn came along, I believe he also had an alliance with another fella by the name of Arthur Hubalek. Anyway, these guys came up with a version of a Ballard that used a striker style of breech block rather than a hammer for the 22rf game. I have a few Ballards, both originals and a few that I've built and am still building, from scratch and from Rodney Storie castings, it's a sickness I have... I tried to find out a little more on the striker assembly a few years ago, but in a moment of weakness, or maybe stupidity, I quit looking and decided to design one of my own. I don't make them for sale or trade, but this sickness has sent me tumbling down this slippery slope and the outcome has resulted in a several different versions of a striker-fire mechanism that I've applied to Ballards ranging from a 22rf, all the way up to a 50-90 Sharps.
I compete in several disciplines with these rifles - ranging from bottle caps to Schuetzen, silhouette to gong matches with these. Understand some of the disciplines such as BPCR silhouette don't recognize a striker as a valid rifle, but if they are one of my sponsored matches, I have the final say.
The lock time on an original Ballard is fairly quick, the lock time on my striker, compares with a bolt gun which is even faster. The travel of the striker I've built is very similar to that of say a 40X, .250" or less, backed by a considerable coil spring. Internal works do resemble that of a bolt gun as that's kind of where I came from with my design.
I've share pics of several of my builds, mostly on the ASSRA forum, a couple here, and few other forums. I'm not retired yet, so regular work gets in the way of my builds but for the last 25 years or more the single shot game has been my passion. Attached are pics of a couple striker breech block assemblies I did a few years ago, they've been in use for some time now.
Hopefully, this brief note either gives some clarity or maybe clouds it more?
GT