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more info on ITX lead free balls

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The author is a member here,
Pletch has often contributed his tests and studies on the forum.
Lot's of priceless info, gotta love it when folks separate fact from myth.
 
" gotta love it when folks separate fact from myth."

Where's the fun in that? This hobby practically exists on myths and :bull:

:rotf:

Yes, thank the Lord that someone like Pletch takes the trouble and time to separate the truth from fiction.
 
Another "Just for giggles" calculation was done by my computer roundball trajectory calculator.

This time I was curious about the downrange energy of the .487 belted ITX ball.
I figure the only people who will really be interested in using these are the people that are forced into it by a lead ban and those people would be hunters.

For my numbers, I chose a muzzle velocity of 1800 fps.
That's faster than Lymans Blackpowder handbook data for a .50 caliber roundball over 80 grains of 3Fg Goex but I figure the balls lighter 157 grain weight will develop a higher velocity than the .490 diameter lead balls 177 grain weight.

The following gives range in yards, velocity and energy:

50-1212 fps-514 lb/ft
70-1081 fps-409 lb/ft
80-1038 fps-378 lb/ft
90-1000 fps-350 lb/ft
100-966 fps-326 lb/ft

Using a normal .490 diameter lead ball at the same velocity the answers are as follows:

50-1255 fps-621 lb/ft
70-1118 fps-492 lb/ft
80-1072 fps-453 lb/ft
90-1034 fps-421 lb/rt
100- 1001 fps-394 lb/ft

(remember, the heavier weight of the lead ball gives higher energy values at a given speed)
 
Given the lower weight/energy and non expansion I'd probably go with 54 or 62 cal. Poly patches were a plastic patch subsitiute for roundballs that were marketed in the 70's. I guess some folks had problems with them and they were discontinued. Something like those might be a way to get around the patch cutting problem.

Poly patches did make an interesting way to shoot balls in 45-70 cartridge rifles. They were very fast and had little recoil.
 
It is a real disappointment that we out here in California are being forced to use these alternatives in most of our hunting areas.

Even though some people here shutter at the idea of using plastic sabots, as far as I can tell I have no real problems using them and at least I can run some of those heavy Barnes Expanders to get more than enough knock down from my .54 side lock.

I would still prefer to run a pure lead conical from it like a minie or maxi, over a PRB in these lower weights.

I used to fire an occasional .451 copper and lead filled pistol bullets sabots from my .54, but the extra .50 caliber size and heavy weight in the BEs are close enough to a lead minie and makes a better hunting projectile than the older saboted bullets that I used to use.

I would think this would be somewhat important with a little extra insurance while hunting different game such as wild pigs, or bear.

I would just feel a little better about having that extra punch when in an area that contains alot of these animals.

From Zonie's ballistic description of about a 15% kinetic energy loss of the ITX compared to lead, it look as though the ITX's lighter projectile weights may be well suited to hunting medium to small game in the smaller calibers with low to moderate charges.

It still looks (at least in calculation) that these .50 caliber ITX round balls would be good enough for deer in slow twist rifles at ranges between to 50 to 90 yards.

Zonie, I am curious to how the trajectory drop comparisons over the different ranges came out in your figures?

Did the ITX round balls hold any significant difference compared to lead?

Which one shot flatter over the best average range?

I know real world results would be different, but at least it would be nice to know anyway.
 
The trajectory was very close to being the same.
Not enough difference to comment on up to the 100 yard range I set the aim point at.

Beyond 100 yards, the lighter ITX lost velocity faster so its drop was greater. At 120 yards the ITX dropped 4.6 inches vs the 3.5 drop of the lead ball.
 
Thanks Zonie. :hatsoff:

Just some real world practice with that .50 and a bit of elevation change could potentially still bring some meat home at the longer ranges. :)

I still do not like ranges much longer than 80 to 90 yards for my .54 side lock.

Next issue with these is determining best patch thickness.
 
necchi said:
The author is a member here,
Pletch has often contributed his tests and studies on the forum.
Lot's of priceless info, gotta love it when folks separate fact from myth.

Thank you for the kind words. I confess it is a lot of fun. I should say that after months of fighting some corrupted files, my son and I have switched the site over to a new authoring system, and now we have a facelift. We hope the new site is more attractive and easier to navigate.

Blackpowdermag

Regards,
Pletch
 
Very interesting and important information, especially regarding dry balling. Has anyone performed expansion tests? I'm wondering what these might do encountering bone? Always heard that lead was so effective due to its high cohesive factor. Will these non-lead balls hold together?
 
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