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Air Gun Home Forum Index » Hunting, Pest Control, Varminting » Hunting rats Goto page Previous  1, 2, 3, 4, 5, 6, 7, 8, 9  Next    View previous topic :: View next topic    Posted: Mon Apr 01, 2013 5:38 am whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 Quote: One thing thing for ratting is you need a reasonable scope the little 4x 20 scopes most people buy wont probably gather enough light and unless the building is well lit you shooting in or around you just wont see them. A cheap scope over here can be picked up for about thirty pounds you need maybe a 4x32 or 4x40. So the bigger the objective lens is the better it gathers light then? I know little about scopes. Is 11mm the same as 3/8" dovetail?   Posted: Mon Apr 01, 2013 7:25 am oddtodd Silver Status Member Joined: 30 Dec 2008 Posts: 2029 Location: Richmond, IN USA 11 mm and 3/8 are close enough to fit either one. 3/8 is 9.5 mm _________________ Airguns: Two starlings talking "Larry, did you hear that? Larry?? LARRY!!!!"   Posted: Mon Apr 01, 2013 2:09 pm Staffy1 Member Joined: 06 Mar 2013 Posts: 38 Location: Isle of Wight UK whm1974 wrote: Quote: One thing thing for ratting is you need a reasonable scope the little 4x 20 scopes most people buy wont probably gather enough light and unless the building is well lit you shooting in or around you just wont see them. A cheap scope over here can be picked up for about thirty pounds you need maybe a 4x32 or 4x40. So the bigger the objective lens is the better it gathers light then? I know little about scopes. Is 11mm the same as 3/8" dovetail? Depends on scope quality but generally yes the bigger the objective the more light they suck in and the better the image _________________ Hw77 Feinwerkbau sport   Posted: Mon Apr 01, 2013 6:07 pm whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 Thanks guys.   Posted: Tue Apr 02, 2013 2:49 am dobiman Veteran Member Joined: 30 Mar 2010 Posts: 167 Location: Gil's Isle, USA Another thing to consider. For close range around 20 feet, the lower power setting is more focused. I use 1x at this distance. So, a variable power becomes something to consider. I have a 1-3.5x 20mm on my home ratter. Please don't take my outfit as a recommend, it is just what I use in my house when the rats get in. The other guys recommendations are better for general rat hunting. [/img]   Posted: Tue Apr 02, 2013 3:10 am whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 So is that an IZH-Baikal I see in the picture?   Posted: Tue Apr 02, 2013 4:03 am dobiman Veteran Member Joined: 30 Mar 2010 Posts: 167 Location: Gil's Isle, USA Yes. It is the IZH 61. I have the older one with the steel receiver.   Posted: Tue Apr 02, 2013 4:14 am whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 So how well does work against rats? At least at close range and/or indoors.   Posted: Tue Apr 02, 2013 4:52 am dobiman Veteran Member Joined: 30 Mar 2010 Posts: 167 Location: Gil's Isle, USA Works fine for me. At 450ft/sec it's fairly safe for indoors. Pellets penetrates rats but bounces off the walls.   Posted: Tue Apr 02, 2013 4:58 am whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 I thought at that speed a pellet will penetrate drywall.   Posted: Tue Apr 02, 2013 10:56 am Jetronic Member Joined: 05 Jan 2013 Posts: 33 Location: Belgium whm1974 wrote: So the bigger the objective lens is the better it gathers light then? I know little about scopes. Within limits, and there are drawbacks aswell. I have to leave for work now, but search for "exit pupil", "parallax error" and the bigger the lenses the worse they suffer from recoil   Posted: Tue Apr 02, 2013 9:03 pm Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Quote: search for "exit pupil", "parallax error" Jetronic is right. To get you started: http://en.wikipedia.org/wiki/Exit_pupil http://en.wikipedia.org/wiki/Parallax In general, a bigger objective lens will gather more light and provide a brighter image. The problem is on the other end, where the scope smooshes all that light down into a little beam and squirts it into your eye. If the beam is bigger than the little hole in your eye, part of it won't get in and the effect of the bigger objective lens will be lost. The size of the beam is easy to calculate - objective lens size divided by magnification. If you have a 4X scope with a 32mm objective, the beam size ("exit pupil') will be 8mm (32/4). Turn up the zoom to 8X and the exit pupil will be 4mm (32/8). A young person's eye will probably accept an 8mm exit pupil, but as one ages it goes down to 5mm or 6mm. For me at age 59 a 4X32 scope will have an exit pupil bigger than my eye can use. A 4X40 scope would gather more lght, but I wouldn't benefit from it. _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Tue Apr 02, 2013 11:03 pm whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 Thanks Slavia. I have learned quite a bit since joining this forum.   Posted: Wed Apr 03, 2013 9:43 pm Jetronic Member Joined: 05 Jan 2013 Posts: 33 Location: Belgium whm1974 wrote: Thanks Slavia. I have learned quite a bit since joining this forum. one more thing to add: an exit pupil bigger than your eye-pupil can cause extra parallax errors, unless your scope is parallax free at the distance you're looking. I'd get a 6*32 with adjustable AO for ratting. will work just fine upto 50 yards, is light and has a good field of depth so you don't need to adjust the focus (and parallax) for every shot   Posted: Wed Apr 03, 2013 10:28 pm whm1974 Veteran Member Joined: 05 Feb 2013 Posts: 337 Quote: I'd get a 6*32 with adjustable AO for ratting. will work just fine upto 50 yards, is light and has a good field of depth so you don't need to adjust the focus (and parallax) for every shot Thanks. Most likely I'll use open sights at first, then move to a scope later. 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