Stellan,
I don’t think TRESO nipples for ROA are available any longer, although there must be remnant inventories. They were the nipples we recommended for our
Classicballistx cylinders. Our recommendation now is SlixShot. Either is head and shoulders better than anything else such that we figure all others are money wasted. Consistent precise fit and superior, reliable ignition are the reasons why. You will be money and performance ahead buying them regardless of cost. It should be noted that Ron Blomquist’s ROA nipples are their equal, but sometimes difficult to obtain.
Remington #10 caps seem to be the solution for the ROA. They fit TRESO and SlixShot nipples correctly and closely without need of pinching or crimping. With their small flash holes, TRESO and SlixShot deliver good ignition with about any propellant, compressed or not. Their flaw is that their metal is thin and soft - making for more positive ignition, but more prone to disintegration with very heavy loads. Again, the smaller flash hole of TRESO and SlixShot nipples compensates greatly by better pressure containment and Rem #10’s rarely disintegrate on them even when using near maximum charges.
If your intent is to simply go “bang” with light charges and round ball with indifference to accuracy, many combinations will satisfy. But proper nipples and well fitting quality caps will prove materially more accurate even in such loadings.
That’s our experience, anyway.
I don’t know about their distribution in Finland, but I know Remington #10’s to be available in Germany through Frankonia. And we have clients using them on our cylinders in Norway, Denmark, and Sweden. Nipples are not restricted for export here, so if you cannot find SlixShot elsewhere, let us know and we will arrange.
Edo.
CBX