Wind effect on 100 grn bullets

25 October 2008, 00:38

303Guy

Check out JBM - Calculations. You can do a comparison between differenct bullets and velocities. You may find the 100gr bullets at those velocities to be quite good.

quote:
Trajectory Output
Input Data
Manufacturer: Nosler Description: .257 dia. 100gr. Partitionâ„¢

Calculated Table
Range Drop Drop Windage Windage Velocity Mach OGW Time Lead Lead
(m) (cm) (moa) (cm) (moa) (ft/s) (none) (lb) (s) (cm) (moa)
0 -4.0 *** 0.0 *** 3200.0 2.866 491.5 0.000 0.0 ***
50 1.3 0.9 0.5 0.4 3052.9 2.734 426.8 0.052 52.5 36.1
100 3.9 1.3 2.2 0.8 2910.7 2.607 369.9 0.108 107.5 37.0
150 3.2 0.7 5.1 1.2 2773.1 2.484 319.9 0.165 165.3 37.9
200 -0.8 -0.1 9.3 1.6 2639.7 2.364 275.9 0.226 225.9 38.8
250 -8.6 -1.2 14.9 2.0 2510.2 2.248 237.3 0.290 289.6 39.8
300 -20.7 -2.4 21.9 2.5 2384.4 2.136 203.3 0.357 356.7 40.9
350 -37.3 -3.7 30.6 3.0 2262.2 2.026 173.6 0.427 427.3 42.0
400 -59.2 -5.1 41.0 3.5 2143.5 1.920 147.7 0.502 501.8 43.1

24 Oct 2008 12:39:39, JBM [http://www.eskimo.com/~jbm]

Trajectory Output
Input Data
Manufacturer: Nosler Description: .308 dia. 165gr. Accubondâ„¢

Calculated Table
Range Drop Drop Windage Windage Velocity Mach OGW Time Lead Lead
(m) (cm) (moa) (cm) (moa) (ft/s) (none) (lb) (s) (cm) (moa)
0 -4.0 *** 0.0 *** 2800.0 2.508 740.9 0.000 0.0 ***
50 1.9 1.3 0.6 0.4 2683.4 2.403 652.2 0.060 59.8 41.1
100 4.2 1.4 2.3 0.8 2569.9 2.302 572.8 0.122 122.3 42.0
150 2.5 0.6 5.3 1.2 2459.2 2.203 501.9 0.188 187.6 43.0
200 -3.6 -0.6 9.6 1.6 2351.2 2.106 438.7 0.256 255.8 44.0
250 -14.5 -2.0 15.3 2.1 2245.9 2.012 382.3 0.327 327.2 45.0
300 -30.6 -3.5 22.5 2.6 2143.2 1.920 332.3 0.402 401.9 46.1
350 -52.5 -5.2 31.4 3.1 2043.2 1.830 287.9 0.480 480.3 47.2
400 -80.7 -6.9 42.0 3.6 1946.0 1.743 248.7 0.563 562.6 48.4

24 Oct 2008 12:43:07, JBM [http://www.eskimo.com/~jbm]

Hope this helps. I tried to select a velocity attainable at similar pressure for each cartridge.

25 October 2008, 02:54

Abob

Thanks 303, great site, are there any more sites like this out there that i don't know about?

Any western hunters out there with experience shooting on the windy plains?

25 October 2008, 03:05

303Guy

You're welcome. There probably are a lot of great sites I don't now about. Have you checked out AmmoGuide Interactive? It is a paid site - $18 U.S. per year, I think. I used to look at it a lot when it was still almost free but they restricted free member access a lot more now. I thought it was good. One day I will become a paid member!

25 October 2008, 03:11

Abob

I have been googling "reloading" a lot, but did not see that site

Thanks again Mate

Hope you got fair windows down there in NZ

25 October 2008, 04:09

303Guy

It's a pleasure! Good luck on your hunt!

Did you know that we are upside down, down here and this caused the blood to flow into our heads and makes us do crazy things?

26 October 2008, 22:20

Abob

303guy

Have you seen or used this site, I use apple computers so I can't use it

http://www.huntingnut.com/index.php?name=News&file=article&sid=3

Cheers

27 October 2008, 00:24

303Guy

Thanks for that Abob. I have started having fun with it already!

It's a way better system of keeping load data than my spreadsheet I have been using.

Say,... Do you Folks have an equivalent of what we had in my country of birth that we called 'droer vors' which means simply means dry sausage but is actually spicey recipe and I believe makes a pretty good game meat treat, ideal for carrying in ones back-pack?

27 October 2008, 00:53

Abob

I believe you are talking about what we call jerky, you take any meat (store bought or wild) and soak in your favorite recipe and then slowly smoke/dry; not really a sausage, does not require any refrigeration, favorite on any trail

http://www.randyq.addr.com/jerky/jerky.htm

Does that sound like your droer vors?

27 October 2008, 01:11

303Guy

quote:
Does that sound like your droer vors?

That's what we call 'biltong'. Even then, there are differences but I am not sure exactly what. Basically, biltong is salted then hang dried meat. The 'droer vors' is spiced sausage which is simply dried. The origins, I think, was for preservation in the days of hot weather and no refrigeration. Bilton was made in the cold, dry, winter months, mainly. Here in NZ we use 'biltong makers' - a heated drying cabinet, often just a cardboard box with a light bulb at the base and some vent holes. (I use my hot water cylinder cabinet).

27 October 2008, 01:29

Abob

Ok, Try this site, company is owned by a chef who came to Alaska from Germany; I'm sure other people make them, very popular up here

Checkout the Hunter Sticks, we really love them, always have some of our moose & caribou turned in to hunter sticks

http://www.alaskasausage.com/IBS/SimpleCat/InfoPage/asp/Comp_ID/17313.html

27 October 2008, 01:52

303Guy

quote:
Checkout the Hunter Sticks, we really love them,

Thanks for that Abob. Now to find someone local to do it!

27 October 2008, 01:56

Abob

You are welcome, talk to you later, off to the range with my son, try ome of our antelope loads

29 November 2008, 06:53

Abob

Hey 303 Guy, did you ever find someone to make your 'droer vors'???

29 November 2008, 08:25

Karoo

quote:
That's what we call 'biltong'. Even then, there are differences but I am not sure exactly what. Basically, biltong is salted then hang dried meat. The 'droer vors' is spiced sausage which is simply dried. The origins, I think, was for preservation in the days of hot weather and no refrigeration.

You are describing two distinctly South African foods, biltong and drÃ¶e wors (Afrikaans for dried sausage). Biltong is made quite differently to jerky which, I understand, is more marinated before drying.
DrÃ¶e wors is also wind-dried with spices and traditionally sheep fat to keep it moist. There is a real trick to getting it to have just the right blend of meat and fat to keep it moist and tasty without it being too gooey and stick-to-the-roof-of-your-mouth like.
A search on the internet with the correct spelling may help find a recipe.

29 November 2008, 09:01

Abob

Thanks Karoo, as I told my new friend from New Zealand, we have somtehing here in Alaska that we call "hunter's stick" that sounds a little like your Doe wors, it was made famous here by a German butcher who moved to Alaska in the 60s, he uses moose or caribou

29 November 2008, 21:59

Karoo

"A search on the internet with the correct spelling may help find a recipe."

After all that I got the spelling wrong myself. It should read DroÃ« Wors with the two dots on the 'e'.
I had some today (kudu) and it was delicious!

30 November 2008, 11:21

303Guy

Thanks for the 'correction' Karoo. (Your handle gives your location away

). I'm from Natal originally hence my 'ignorance' on the DroÃ« Wors. I have seen ordinary (but good quality) Boer Wors being dried and it was just fine. (We had trouble getting the good stuff but it there).

quote:
Hey 303 Guy, did you ever find someone to make your 'droer vors'???

Yes I did. A workmate is from the old South West Africa and knows these things. I have to harvest him some deer and he will turn it into DroÃ« Wors and will give me some.

Abob,how did your hunt go?
I have just baptised my 303-25 using 100gr Sierra's. (I have only shot feral goat so far and will think twice about using it on red deer and will be careful on fallow. Three goats with totally shattered shoulders puts this combo in the varmint class. Recoil and muzzle blast is minimal with a muzzle device I made and fitted).

30 November 2008, 21:39

Abob

Great news 303 about the DroÃ« Wors and 303-25

Our antelope hunt is next August, I'm starting my planning early so you still got about 7 months of my questioning

Do you have a string on your 303-25, it sounds interesting

01 December 2008, 10:53

303Guy

quote:
I'm starting my planning early ...

Good - that way you will be well prepared.

I still need to gather more data on my 303-25. I have used it only this once and then the ammo was loaded by someone else and came with the rifle. It seems accurate enough, requiring single shots for scope adjustment. I have no idea whether the 'device' - I am not sure what to call it - had any effect on accuracy. I have not even fired a group with it but I did shoot some feral goat and found the caliber to be quite effective and very pleasant to shoot. The 'device' just has to be reducing recoil since recoil is not noticeable. (It must be there since the sight picture is disturbed to some degree). I would not recommend standard cup & core bullets at those velocities for bigger game. The effect on goats was 'shattering' - literally. The first one was struck on the ball of the shoulder and shattered the entire bone, the shoulder blade, the shoulder muscle and several ribs before entering the chest then abdominal cavity. The bullet did not exit. The second goat was the same except the bullet exited on the side of the ribcage and the animal had to be dispatched. The third goat took it through both shoulders - the entry shoulder was totally shattered. I think the bullets were 100gr Sierra SPS.

Your 257 A.I. Roberts is going to have a lot higher velocity than my humble 303-25 (which is about the same as a 250 Savage), so ... â€¦

01 December 2008, 13:41

ole_270

Abob, just noticed you were the guy asking about the 270 load. Your .257AI should be a great antelope gun. I took one last year with my standard .257 Roberts using 100 Hornadys at 3050 fps and it did very well. Range was 375 from a laser, but not much wind at the time to contend with. If that 110 AB shoots in your rifle(won't in mine) it should really be 1st class. I've read where a lot of guys with standard chambers and 10" twist barrels have trouble getting the 110 to shoot well. Too bad they didn't make it a little lighter so it would be short enough for those barrels.
Between the two rifles, you've got the plains and my favorite cartridges about covered!

01 December 2008, 21:31

303Guy

Does that mean a 120gr spitzer won't stabilize in a 1 in 10 twist barrel? (Speer Reloading Manual No, Ten shows the 120gr spitzer and the 120gr boat tail in a 1 in 10 twist 250 Savage so maybe it works in some 1 in 10's).

quote:
... took one last year with my standard .257 Roberts using 100 Hornadys at 3050 fps and it did very well. Range was 375 from a laser ...

That bullet would have been doing over 2100 fps at that range - nothing wrong with that.

01 December 2008, 22:03

ole_270

Haven't tried any of the 120s, the 117 Sierra did ok, but I've shot over 150 110AB with several powders and can't come up with a load I'm happy with. Several guys around the web have said the same thing with their .257 Roberts. I've yet to try the 110s in my .250, the 100 hornady works too well at those speeds.

02 December 2008, 22:40

Abob

ole_270, I'm planning on using my 257 AI for our WY antelope hunt because I donâ€™t get to use it too much here in Alaska anymore, killed a Dall Sheep & 2 caribou with it but I ran into grizzly bears and decided to start caring something bigger

However, if the Bob doesn't start shooting straighter, I switching to my trusty 270

08 December 2008, 17:55

Thomas Jones

One factor,
I allways include when I am thinking about windage.
Velocity and balistic coeficciant. The quicker the bullet gets to the target the less chance the wind has to move it. And BC helps alot. less wind restance a high BC helps keep the velocity high longer.
...tj3006

08 December 2008, 21:55

303Guy

quote:
Going to hunt antelope in Wyoming next year and I'm working up a load for my 257 ROB AI; I like what I read about 100-110 grn 25 cal bullets but concerned they may be too light in windy conditions???

From the info gathered on my thread, it would seem that the 100gr TSX would be a superb performer in the AI Bob. You would get it to, what, 3200fps? I do not know the BC for that bullet so I used the 90grBTHP for the calc.

Calculated Table
Range Drop Drop Windage Windage Velocity Mach OGW Time Lead Lead
(yds) (in) (cm) (in) (cm) (ft/s) (none) (lb) (s) (in) (cm)
100 1.4 3.5 1.0 2.4 2861.6 2.563 266.1 0.099 17.5 44.3
150 1.3 3.3 2.2 5.6 2700.6 2.419 223.6 0.153 26.9 68.4
200 -0.0 -0.0 4.0 10.2 2544.5 2.279 187.0 0.210 37.0 94.0
250 -2.6 -6.7 6.5 16.4 2393.7 2.144 155.7 0.271 47.7 121.2
300 -6.8 -17.2 9.6 24.4 2248.0 2.013 129.0 0.336 59.1 150.1
350 -12.7 -32.1 13.5 34.2 2107.2 1.887 106.2 0.405 71.2 180.9
400 -20.5 -52.0 18.2 46.2 1969.0 1.764 86.7 0.478 84.2 213.8

08 Dec 2008 09:53:42, JBM [http://www.eskimo.com/~jbm]

If one could get 2900fps with a 120gr BTSP, wind drift at 400yds would be a mere 13 inches in a 10mph cross-wind!

Calculated Table
Range Drop Drop Windage Windage Velocity Mach OGW Time Lead Lead
(yds) (in) (cm) (in) (cm) (ft/s) (none) (lb) (s) (in) (cm)
100 1.7 4.2 0.7 1.8 2684.4 2.404 417.8 0.108 18.9 48.1
150 1.5 3.8 1.6 4.2 2580.4 2.311 371.1 0.165 29.0 73.5
200 -0.0 -0.0 3.0 7.6 2478.8 2.220 329.0 0.224 39.4 100.1
250 -2.9 -7.4 4.7 12.1 2379.5 2.131 291.0 0.286 50.3 127.7
300 -7.3 -18.6 7.0 17.7 2282.5 2.044 256.9 0.350 61.6 156.4
350 -13.4 -34.1 9.7 24.6 2187.7 1.959 226.2 0.417 73.4 186.5
400 -21.4 -54.3 12.9 32.8 2095.0 1.876 198.6 0.487 85.7 217.8

08 Dec 2008 09:59:21, JBM [http://www.eskimo.com/~jbm]