WHICH REAR SIGHT BLADE

[murf205]

I just came into a 6 1/2" 25-2 and it groups my cast bullets in a really tight group....about 12" high with the rear sight bottomed out on the frame. It is a .146"rear and I'm shooting loads in the 800 ft second range so it is in the 45 acp range of bullet speed. My question is, will a .126" rear blade get the point of impact down to the top of a 6:00 hold at the 25 yd line? I can pump up the load a bit but that is not what a N frame acp gun is about and I don't think I could get a 12" change of impact safely anyway.. I have a 25-5 if I need some go faster stuff! Thanks in advance for any suggestions.
Murf

 

[steelslaver]

A difference of .02 over 8" equates to .06 in 2' and as 25 yards is 75'. 75'/2'=37.5 and 37.5x.06=2.25". A .106 blade is available and that should take you down about 5"

Try a tighter grip, a big part of it is how much the gun rises during recoil

PS. Most revolvers tend to shoot low for me. But, I have huge hands and wrists. I also have a home made Ransom rest. I can cause a raise or lowering of a bullets impact by either loosing or tightening the clutch mechanism that controls the rotation of the guns recoil

 

[usedkid]

Try letting a shooting buddy shoot it and see where it shoots for them before changing sight blades...

 

[murf205]

I have a pretty tight grip on the stocks. Not overly tight but it is the same as my other N framed guns. A home made Ransom rest?? Would you like to post a pic of that little project? My interest level just went to high!

 

[steelslaver]

Basically just a copy of a ransom rest. The hard part to figure our was a clutch disk. Ended up using disk from a John Deere fan clutch. It uses regular Ransom rest inserts. You can tighten the clutch using a 3/4" wrench on the 1/2" bolt. Thumb screws to adjust elevation and windage as the circular plate it is mounted on pivots. You can lock that down also. I use ratchet straps to firmly secure it to the cement bench tops at range. I have since painted it up blue.

 

[Chuck Edwards]

What bullet weight are you loading? Running relatively heavy SWCs could be raising your POI that high. Bullet weight impacts POI much more than velocity in revolvers.

I have to keep two sets of ammo in .38 Special, 125-130 grains and 148-158 grains. Most of my fixed-sight guns are regulated for 158s, but my 642 and 4" 10-5 need 125-130 grain ammo to hit to POA. My 22-4 hits to POA with 230-grain factory ammo and my 225-grain handloads; I've never tried it with other bullet weights.

 

[murf205]

I am shooting a 250 gr cast. I know that a heavy bullet will have more barrel time(slower load) but mine are in the same range as factory hardball. Not exactly but pretty close. I wish I had pics of the target but like I said, the poi is at least 12" above a 6:00 hold at 25 yds. I think I will shoot it again with some 225's after the holidays but I am still betting it will take a lower rear blade. I might be wrong but we'll see.

 

[H Richard]

I use a 200 Gr Semi-Wadcutter (H&G68) at about 750 and the stock sight is pretty well centered groups.