Ball trajectory

[longcruise]

Do you use the #13 bore cleaner as a patch lube?

The #13 bore cleaner is a much better lube than cleaner. Don't waste it cleaning.

 

[harleynut]

The #13 bore cleaner is a much better lube than cleaner. Don't waste it cleaning.

Absolutely!!

 

[Salty]

Yes i do!! In the all white bottle

I just ordered some.
Thanks

 

[Sun City]

Balls/bullets do not rise! The sec they exit the muzzle they start dropping! They cross the line of sight twice and where they cross the line of sight the second time is the zero range!

 

[TDM]

Balls/bullets do not rise! The sec they exit the muzzle they start dropping! They cross the line of sight twice and where they cross the line of sight the second time is the zero range!

That is correct.

 

[harleynut]

I just ordered some.
Thanks

Let soak over night dab dry when loading i compete and this has worked with one other additive 8) for years

 

[longcruise]

I thought I would post these examples of trajectory for the possible use by our members.

But first, let me say that I don't sight my guns according to these charts and would not suggest anyone else do it. This is just to illustrate a concept. All of the data below is based on correct ball diameters and ballistic coefficients. All assume a front sight height of .70" above the centerline of bore (That is pretty close for most ml guns). Since this is hunting scenario data, I used 1750 fps for all three ball sizes. This is not necessarily on the nose for everyone's guns but once again it is very typical.

I call this the "three inch rule" because if you sight your gun to impact about 1.5" high at 50 yards your POI will be within a three inch circle between muzzle and 100 yards. It's not etched in stone and you can see variations in the data below. OTOH, If I called it the 4" rule it would be right on!

1. .445 ball

Range Elevation Velocity

0 yds -0.70 in 1750 fps

25 yds 1.09 in 1428 fps

50 yds 1.81 in 1182 fps

75 yds 0.97 in 1029 fps

100 yds -1.86 in 934 fps

125 yds -7.01 in 863 fps

---------------------------------------------

2. .495 ball

Range Elevation Velocity


0 yds -0.70 in 1750 fps

25 yds 0.93 in 1456 fps

50 yds 1.52 in 1221 fps

75 yds 0.66 in 1064 fps

100 yds -2.09 in 966 fps

125 yds -7.05 in 895 fps

------------------------------------------

3. .535 ball

Range Elevation Velocity


0 yds -0.70 in 1750 fps


25 yds 0.91 in 1475 fps


50 yds 1.51 in 1250 fps


75 yds 0.71 in 1090 fps


100 yds -1.89 in 990 fps


125 yds -6.62 in 918 fps

 

[Salty]

Great useful information. Thank you.
Although there are some folks out there who will claim every question has been asked and answered.

 

[TDM]

Good info! Thanks @longcruise

 

[longcruise]

Great useful information. Thank you.
Although there are some folks out there who will claim every question has been asked and answered.

I try to be careful about presenting "data" to ML groups. It usually results in responses implying that it's not "traditional" or that our forefathers didn't need chronographs and technology, etc., etc.

But, what I like about it is tech and data can illustrate how simple it really is for the sake of newcomers to the sport. It actually helps shake off the notion among many newcomers that it's so very complicated.

 

[Salty]

My TC .45 hawken straightened out with a .445 rb .015 patch its a tack driver the lube has alot to do with accuracy as well! I use Tc #13 bore cleaner in the all white bottle great to start with.i would shoot at leat 50 rnds if its hitting high and to the left and repeating that area then adjust sights good luck

@harleynut what powder charge do you use?

 

[OldSmoky1967]

Yes i do!! In the all white bottle

I love that stuff!

 

[harleynut]

@harleynut what powder charge do you use?

50-55 pre measured grains in my 45 and 62 grains in my 50

 

[kyron4]

I have a link to a round ball calculator at home. I will post it in the morning.

 

[kyron4]

At 25 yards my rifles bigger than .36 hit dead on or close to it. At 50 yds they are about 2" (+ or -) high. At 100 yds about 4" low. Find your best load before you touch the sights. Reducing the height of the rear will also lower the poi.

I have also found this to be true.