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Whoaru99

Need help with muzzleloader sights.

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Whoaru99

I have a CVA Hunterbolt and I have replaced the barrel-mounted rear sight with a Williams WGRS peep sight that is mounted to the rear most factory drilled/tapped scope mount holes.

I set the rear sight to mid-height on the ramp and fired off three shots at 10 yards. 10 yards should be my first line of sight crossing according to a ballistics program so I usually make first zero at that point then fine tune in at a longer distance from there.

The problem is that with the sight at mid-way up the ramp, I'm shooting 3.25" low at 10yd. I can get almost zeroed by moving the ramp way to the top, but then I have no more adjustments for other possible loads.

So, can anyone tell me how much I have to change the front sight (will require replacement I'm thinking) to put the gun close to zeroed at 10yds?

The front sight is approximately 0.98" above the bore center, and the rear at mid-ramp is about 1.09" above bore center. The distance between the sights is about 27.75".

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Whoaru99

I have found my answer here

But I am still scratching my head how it could be off that far at only 10 yards.

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Gordie

Whoaru99 could you possibly tell me where you picked up the peeps for your gun? and what the cost was? are you running a hooded sight on the front of your barrel? And thats a great link on how sights work I've got a traditions smoke pole that needs a taller front sight. thanks.

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Whoaru99

The rear peep was purchased at Cabela's in Rogers. The new front sight ramp, blade, and different peep apertures were ordered from Midway.

There were some places that better prices than Midway, but they had it all in stock vs. ordering bits and pieces from a couple different places.

You might just want to check the Williams Sights website. They might have a rear peep, front Firesight kit for yours.

If you have to piece it together (rear peep, different front firesight), it'll probably be in the $50-$75 range.

My front sight is not hooded. It's a red Firesight.

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lunker651

I think you need to have it zero in at 50yards. All my gun when I sight/zero at 50yards will shoot 1-2" low at 10 yards even with a scope. I don't think it's your sight that has a problem, you just need to zero it at a longer distance. Once zero at 50 yards then you can make the adjustments you need.

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Whoaru99

Quote:

I think you need to have it zero in at 50yards. All my gun when I sight/zero at 50yards will shoot 1-2" low at 10 yards even with a scope. I don't think it's your sight that has a problem, you just need to zero it at a longer distance. Once zero at 50 yards then you can make the adjustments you need.


I understand what you're saying, but with a scope I can understand being 1-2" low at 10yd because your scope is typically 1.5", give or take a bit, above the bore centerline. At 10yd there is just a tiny bit of drop, and the bullet trajectory is on it's way up, so that makes sense to me to be about that low.

My open sights are only an inch, give or take, above the bore C/L. So, an inch would be the most I'd expect to be low at 10yd considering the bullet trajectory should be going up at that range.

Also, I've used the first line of sight crossing method to sight in several rifles and it's always worked pretty good. Sight for dead on at the first line of sight crossing then you are at least close on paper further down range.

I'll give it (sighting at further distance) a try this weekend, but geometrically/mathematically, that much correction is a full 1/3" at the sights and there just isn't that much adjustment left.

I'll post a trajectory graph if I can figure out how to do that.

D:\My Documents\JoesDelay.gif

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Whoaru99

Quote:

Quote:

I think you need to have it zero in at 50yards. All my gun when I sight/zero at 50yards will shoot 1-2" low at 10 yards even with a scope. I don't think it's your sight that has a problem, you just need to zero it at a longer distance. Once zero at 50 yards then you can make the adjustments you need.


I understand what you're saying, but with a scope I can understand being 1-2" low at 10yd because your scope is typically 1.5", give or take a bit, above the bore centerline. At 10yd there is just a tiny bit of drop, and the bullet trajectory is on it's way up, so that makes sense to me to be about that low.

My open sights are only an inch, give or take, above the bore C/L. So, an inch would be the most I'd expect to be low at 10yd considering the bullet trajectory should be going up at that range.

Also, I've used the first line of sight crossing method to sight in several rifles and it's always worked pretty good. Sight for dead on at the first line of sight crossing then you are at least close on paper further down range.

I'll give it (sighting at further distance) a try this weekend, but geometrically/mathematically, that much correction is a full 1/3" at the sights and there just isn't that much adjustment left.

I'll post a trajectory graph if I can figure out how to do that.


Here's the chart that shows the trajectory being 1st zero at 10yd. The flatter trace is my scoped .223 for reference.

Zeroed1.gif

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