Anyone who has used a "Seabear" pneumatic speargun will have found it very hard to load the gun and pull the trigger while holding the gun steady if you pump it up to the maximum recommended pressure in the English language handbook supplied with the gun. In fact it is very hard to put the stipulated 400 pump strokes into the gun as the hand pump seems to quit after about 200 strokes with very little indication that any air is transferring into the gun after passing that number of pump strokes.
Well imagine my surprise when I recently found the original Russian language handbook for the "Seabear" ("Pirometr" in Russia) guns on the Web. The layout of both documents is very similar, but maximum pumping pressure is listed at 170 hand pump strokes, not 400, so the "Most Atlantic Company" that were distributing the guns in the West were promoting the gun as operating at twice its recommended maximum operating pressure! No wonder that trigger was so hard to pull! Plus it may have risked bending the piston tail and the sear lever hook in the rear of the gun using that sort of pressure.
The "Seabear" is now sold in Russia as the "Orion", if you look up their web-site you can see the original Russian language handbook on a link to a pdf file. The pumping table is self-explanatory, you do not need to understand Russian to work out what it says.
Well imagine my surprise when I recently found the original Russian language handbook for the "Seabear" ("Pirometr" in Russia) guns on the Web. The layout of both documents is very similar, but maximum pumping pressure is listed at 170 hand pump strokes, not 400, so the "Most Atlantic Company" that were distributing the guns in the West were promoting the gun as operating at twice its recommended maximum operating pressure! No wonder that trigger was so hard to pull! Plus it may have risked bending the piston tail and the sear lever hook in the rear of the gun using that sort of pressure.
The "Seabear" is now sold in Russia as the "Orion", if you look up their web-site you can see the original Russian language handbook on a link to a pdf file. The pumping table is self-explanatory, you do not need to understand Russian to work out what it says.