A SIMPLE KILLING POWER FORMULA

[El Chivo]

You 357 bullet likely won't expand past 100 yds, the 30-30 will expand to 300.

not according to Barnes, who designed the bullets that way - that's my point.

[Don McDowell]

You 357 bullet likely won't expand past 100 yds, the 30-30 will expand to 300.

not according to Barnes, who designed the bullets that way - that's my point.

My suggestion would be you get out to the range and so some simple comparison tests. First thing you'll want to do is find out if that stubby bullet in the 357 will stay stabil when it comes back to subsonic. That'll need be tested in both calm and wind conditions, oft times a stabil bullet in calm conditions is anything but stabil in even the slightest breeze. Then you'll need to see if it will print anything resembling a group at 100 yds and beyond. Don't forget to compare the ease of shot placement at distances past 100 yds with both cartriges.
Then after you've seen the 30-30 kick the 357's stubby bullets butt around the range and back, set up a cardboard box full of wood shavings', or sand, or sheets of carpet and let the recovered bullets tell the rest of the story.
Bottom line if you're going to use the 357 and want peformance anywhere near what the 30-30 has been doing for something over a 100 years you'll have to get out of this lite bullet nonsense. IF we get real trusting and assume that that 140 ball will expand, the only thing that will make those wonderful petals do the job is if the bullet still has enough zip behind it to push on thru flesh and bone. This is where momentum and heavy bullets start to gain the advantage over light and fast. If a bullet doesn't have sufficient velocity and momentum to carry it forward it won't do much good. The more a bullet expands the more momentum it needs to keep on going. That piddly thing you're thinking about won't get the job done much past 100 yds, if it'll do it there. The easiest way to check on the momentum potential is to look at a bullets sectional density numbers. The higher the sd the more it will penetrate and the better chance it has at staying stabil at long range.

[JohndeFresno]

thanks for the spreadsheet link...we can...see how they line up.
Grizz

Grizz,
I'm glad if the information was helpful in any way. But since the last download holds only the pre-selected and preformatted data, I have put together a workable spreadsheet that you can fiddle with, without having to enter all of those equations.

If you have Excel, any version from Excel 97 forward, this will work for you as an active spreadsheet.

This is the tail end of the spreadsheet. You can write over the entries or make additional entries, up to the total of 100 formatted records. All you have to do is to enter the data in the first several cells (shown as green in this example).

Actually, you only have to enter bullet weight ("WT"), caliber, and muzzle velocity. The cells holding the automatic calculations are protected from change (the ones shown as red, here); they hold the various formulae that are triggered by your data entry.

To download this spreadsheet (enclosed in a PKZip wrapper), Click on:
http://www.box.net/shared/q007618m4c
(TerminalTKO_BogieCalculator.zip)

[Grizz]

Thanks John

I'll get a couple of my loads in there and see how they stack up. Then the info will be a lot more meaningful to me because I'll have some way to relate to it. I appreciate the effort and will post my comps today hopefully...

Grizz

[Grizz]

Items 51 thru 54 are my current load from my chrono sheets.

I'm not sure about the two 45/70 loads, they seem closer together than what I percieve when shooting them. I'll have to noodle out the percentages when I get my socks off and after a cup of caffein to fire off the synapse. But Bogie's numbers do show the relative OOOoomph compared to the loads at the top of the sheet.

Note the disparity between the tko and B35 results for my two 45/70 loads. A little counter-intuitive but kudos to Bogie35 for getting the number in line with the actual real-world results, at least in so far as my pen testing goes.

Nice work men.

Grizz

BogieNumbers.png