Front Sight Adjustable Iris Sizes ?

[22_308_ShoeTar]

Long time smallbore competitor, recently took up Mid Range , Long Range and Palma,......I'm thinking of switching my my front sight from the 22mm Sinclair Ladder , to the Centra Goliath 30mm and a new adjustable iris, but wondering what size range would be best to go with for those games, any suggestions ? without being able to look right at this second I believe my 22mm has a 2.8-4.8 and that seemed to serve me well so far in my young highpower career, and I've been happy with the sight pictures, but wondering if a different range is better for what I'm shooting and those target sizes ?

C.D.

 

[cxrcr]

Re: Front Sight Adjustable Iris Sizes ?

Most LR shooters with 30mm front sights are also running a .5 power lens so the iris size will need to increase accordingly as the aiming black will appear to be larger. Personally, I use a Gehmann 4.0-6.0 with a Stallings Machine Rightsight. I don't have my databook nearby but believe that I'm usually somewhere between 5.8 and 5.4 when shooting Palma course of fire (800/900/1000). The Centra is nice but the Righsight is significantly cheaper once you add lens, iris, sunshades, etc. You can find significant discussion of both 30mm sights and iris size with lens use on the forums at long-range.com

 

[med17]

Re: Front Sight Adjustable Iris Sizes ?

I'm running a Gehmann 22mm with adj. iris. I keep it set at around 3.6 My rear is a Gehmann also and is set at 1.8 . Depending on light I'll adjust those a little but that setup works well for me. I've noticed more shooters are going to the bigger 30mm and even 34mm, I've considered it but haven't made the leap yet. Those who have switched have been pleased. My 2 cents

 

[John L]

Re: Front Sight Adjustable Iris Sizes ?

The Right Site from Stallings Machine is the cheapest route to get a complete 30mm front sight. Add up the costs of all the individual pieces the Centra does not come with (sunshades front and rear, and lens are just two) that the Rite Sight does. That being said your iris size will depend on what power lens you run, if any, and personal preference as to the amount of white you like around the bull. I use a .5 lens and my iris size is at about 5.5 to 6.0 depending on the particular range and lighting.