Posted: 12/16/2007 1:42:46 PM EDT
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Who has some information and opinions on bloop tubes. Im thinking about building a DCM Match rifle, but was toying with haveing a second standard sight fitted to the very end of a 24" varmint barrel. I like this idea because it would be durable and always there. A bloop tube would give me several more inches, but they look frail to me and like you have to set your sights every time you take them on and off. Some links would be nice. |
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[A bloop tube would give me several more inches, but they look frail to me and like you have to set your sights every time you take them on and off. Your right. I have seen several "NRA" match rifles with them. I have seen competitors fooling with them before, "during" and after matches. A gimmick to me but then again, I am a service rifle shooter!  Get the sight on the barrel. A 24" barrel gives you plenty of sight radius in my opinion. Dave McGrath |
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The rule of the thumb is a longer sight radius should improve your scores. Easier on the eyes or less fatigue. So I am told. I really don't know because I can still see the front post on my AR's. On a match rifle (space gun) the sights I have seen are usually clamped onto the barrel. You must know the diameter of the barrel at the muzzle to get the right one. Here is a link to them at Champion's Choice. http://www.champchoice.com/shop.php?respp=10&action=viewpage&page_num=4 On the bloob tube or sight extensions here are a couple: http://www.champchoice.com/shop.php?respp=10&action=viewpage&page_num=8 I can't get the above link to high light. Go to Champion's Choice web site. Click on sight bases and mounts. Go to page 8. Hope this helps at least until a match rifle shooters chimes in. Dave McGrath |
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Dave you see guys fooling with bloop tubes because many are quick on/off, they line up the locating pin and tighten her down; a quality setup will hold zero extremely well. Not a match rifle shooter but bloops have been on International guns for years as "the sight must not extend past the apparent end of the barrel" Bloops tubes come in many styles. I am in the process of making one from a stainless barrel. It will be threaded and will install in place of my flash hider. A bloop tube providing 30" of sight radius will typically yield this: A called shot at 8 o'clock will typically be one quarter your previous called error on a 20" sight radius, i.e. intstead of a 1/2" out it will be more like 1/8" out. You still have to do your job but the increased sight radius exagerates your aiming errors. They aren't frail but I would surely treat them as frail with a $250 on up sight hanging waaaay out there. ETA: The International shooters use the bloops because they use a stiff, short (20") barrel that lets the shot get gone in a hurry, shortening the length of time for you to influence the shot during followthrough and the bloop tube let's them have the benefit of the long sight radius. Bob Foth, the 1992 Olympic Silver Medalist uses a full length barrel with a loooong bloop tube. He has to have at least 36" sight radius. |
| Bloop tubes are most important for older shooters who cannot focus well close up. In that case, a bloop tube can make a huge difference. David Tubb sells a fine blooper that glues on the end of the barrel, and needs the final 1.5" turned down to 0.750" diameter. The bloop tube has a .750" section at the far end, so you can use the most common diameter of front sight barrel band. Another advantage to the extension is that you can crank the tension screws down tight on the barrel band, and not worry about affecting accuracy. This type does not come off the barrel without getting heated by a torch to loosen the glue (J-B Weld or similar). |