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My SP101 shoots high.

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Old February 17th, 2013, 07:37 PM   #1
 
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My SP101 shoots high.

I bought a new SP101 in 357 with the 2 1/4 inch barrel thats a blast to shoot but it consistently shoots 3 to 4 inches high with factory 158 grain ammo at 10 yards. Moving back to 15 yards makes the bullets raise another inch or two. I get really good groups its just that they're all high. I'm thinking that I can bring the groups down to the bullseye with reloads, so for no particuliar reason, I grabbed some IMR 4227 and loaded 10 rounds with 13 grains pushing a 158 grain XTP. They shot high so I loaded 10 more with 14.5 grains and they shot high also. I'm still a ways away from max load ranges but I'm curious if I'm on the right track. Will the bullets come down to point of aim as the loads get hotter? I've only been reloading since the first of the year so I would appreciate any info a more experienced reloader could give. Thanks.



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Old February 17th, 2013, 08:09 PM   #2
 
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In my experience, no. Try going lighter on the loads.

In my GP, 38s always print lower than 357s when using the same weight bullets. When I was shooting a 327 SP, the hotter 100 grain loads shot considerably higher than the lighter 85 grain self-defense loads.
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Old February 17th, 2013, 11:29 PM   #3
 
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Quote:
Originally Posted by Clippers View Post
I bought a new SP101 in 357 with the 2 1/4 inch barrel thats a blast to shoot but it consistently shoots 3 to 4 inches high with factory 158 grain ammo at 10 yards. Moving back to 15 yards makes the bullets raise another inch or two. I get really good groups its just that they're all high. I'm thinking that I can bring the groups down to the bullseye with reloads, so for no particuliar reason, I grabbed some IMR 4227 and loaded 10 rounds with 13 grains pushing a 158 grain XTP. They shot high so I loaded 10 more with 14.5 grains and they shot high also. I'm still a ways away from max load ranges but I'm curious if I'm on the right track. Will the bullets come down to point of aim as the loads get hotter? I've only been reloading since the first of the year so I would appreciate any info a more experienced reloader could give. Thanks.
Install a taller front sight?

The conventional wisdom is that a slower bullet, having more residence time in the barrel (such as it is, very short in your revolver) will be leaving the muzzle when it is pointed higher. So lighter (lower velocity) loads should print higher and heavier loads should print lower.

With a short barrel, this rule of thumb may be overcome by other factors, though, so I imagine you will have to experiment for yourself.

Good luck

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Old February 18th, 2013, 12:21 AM   #4
 
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What aiming position should be done with the SP101? 6 o'clock? My Sig requires a combat style. It's the reason I'm asking.
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Old February 18th, 2013, 02:58 AM   #5
 
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The faster the bullet leaves the muzzle the lower the poi should be. You're on the right track, but you may want to look for some 140 grain or similar weight bullets too.

I use a 6 O'clock poa with the expected poi being just atop the front sight.

On a defensive snubby I'm not as picky as I am with other's though, as I expect it's use to be at very close range.
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Old February 18th, 2013, 09:18 AM   #6
 
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My dad's SP-101 does the same with 158g bullets. So dropped the bullet weight to 125g and now at least is the ball park. I don't know why Ruger can't install the taller front sight as you can always 'file' to adjust up for your favorite bullet and load. .

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On a defensive snubby I'm not as picky as I am with other's though, as I expect it's use to be at very close range.
True ... but at the range it is fun to shoot out to 70+ yards with a shorty. I have a lot of fun doing this with my .44Spec Bulldog. If you can hit them 'out there', you certainly can hit them close . I like my guns to shoot to POA period.

Last edited by rclark; February 18th, 2013 at 09:20 AM.
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Old February 18th, 2013, 09:28 AM   #7
 
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Lower your sight plane....next
Quote:
Originally Posted by Clippers View Post
I bought a new SP101 in 357 with the 2 1/4 inch barrel thats a blast to shoot but it consistently shoots 3 to 4 inches high with factory 158 grain ammo at 10 yards. Moving back to 15 yards makes the bullets raise another inch or two. I get really good groups its just that they're all high. I'm thinking that I can bring the groups down to the bullseye with reloads, so for no particuliar reason, I grabbed some IMR 4227 and loaded 10 rounds with 13 grains pushing a 158 grain XTP. They shot high so I loaded 10 more with 14.5 grains and they shot high also. I'm still a ways away from max load ranges but I'm curious if I'm on the right track. Will the bullets come down to point of aim as the loads get hotter? I've only been reloading since the first of the year so I would appreciate any info a more experienced reloader could give. Thanks.
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Old February 18th, 2013, 11:23 AM   #8
 
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Lower your sight plane....next
Gee, why didn't I think of that.
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Old February 18th, 2013, 11:28 AM   #9
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Try this.. Shoot with both eyes open. I had the same issue and that worked..
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Old February 18th, 2013, 11:32 AM   #10
 
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Originally Posted by rclark View Post
My dad's SP-101 does the same with 158g bullets. So dropped the bullet weight to 125g and now at least is the ball park. I don't know why Ruger can't install the taller front sight as you can always 'file' to adjust up for your favorite bullet and load. .

True ... but at the range it is fun to shoot out to 70+ yards with a shorty. I have a lot of fun doing this with my .44Spec Bulldog. If you can hit them 'out there', you certainly can hit them close . I like my guns to shoot to POA period.
Exactly, its a non-factor at close range for CCW, but once in a while I like to take out a pesty oppossum or raccoon. Just the fact that its not hitting where I aim bothers me. I want to be able to aim just below the center and hit the bullseye at 10 to 15 yards. I'll keep experimenting.
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Old February 18th, 2013, 11:34 AM   #11
 
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Try this.. Shoot with both eyes open. I had the same issue and that worked..
I will definetly give that a try. Could it be that simple?
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Old February 18th, 2013, 11:41 AM   #12
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It's 3"-4" at 10 yards then a taller front sight is in order. I would shoot from bags and squeeeeeze, if it's still that way then replace the front sight.
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Old February 18th, 2013, 11:42 AM   #13
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I will definetly give that a try. Could it be that simple?

Worked for me and I also replaced the front sight..
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Old February 18th, 2013, 12:05 PM   #14
 
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Can you get the front sight from Ruger? I looked in the Midway catalogue today and couldn't find a taller front sight. I could only find factory replacement parts.

Last edited by Clippers; February 18th, 2013 at 12:10 PM.
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Old February 18th, 2013, 12:38 PM   #15
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I have a Hi-viz fiber optic on mine..


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