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need data and suggestions for 338 lapua

 
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  #8  
Old 02-15-2010, 02:07 PM
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Re: need data and suggestions for 338 lapua

Long Time Long Ranger, Krieger wont have my barrel done for 18-20 weeks they waid so im gonna be a little while before I can start load development. I very well may take you up on your offer. You come through Basin regularly huh? what town do you live in?
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Old 02-15-2010, 04:10 PM
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Re: need data and suggestions for 338 lapua

Ballistic comparision between Barnes 250g and 300 SMK at 5K ft., standard atm. pressure, 50% rh, 30 deg using velocities that I think are reasonable from a chambering like the 340Wby--someone can correct my est. MV's if they'd like to as I don't have a great deal of experience with that chambering. Just numbers, yes, but at some point, numbers can give valid comparisons.

The numbers for the Barnes are generous as it is using Barnes G1 bc of .425 (likely derived at 3k fps) for the entire flight of the bullet using Exbal.

The numbes for the 300SMK are derived using Litz's experimental data which show significant decrease in bc over the flight of the bullet. Exbal used for both.

300SMK at 2680fps MV:

@500 yds--2199fps and 3222 ft. lbs., 9.5 MOA ele. adj. from 100yd 0, 2 MOA for 10mph crosswind

@1K yds--1752 fps and 2045 ft. lbs., 26.75 MOA ele. adj. from 100yd 0, 4.5 MOA for 10mph crosswind



250 Barnes at 2900 fps MV:

@500 yds--2024 fps and 2275 ft. lbs., 9.25 MOA ele. adj. from 100yd 0, 3.5 MOA for 10 mph crosswind

@1K yds--1336 fps and 990 ft. lbs., 30.5 MOA ele. adj. from 100yd 0, 8.5 MOA for 10 mph crosswind



I know which bullet I'd rather shoot. Just me.
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Old 02-15-2010, 05:44 PM
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Re: need data and suggestions for 338 lapua

Jmden, I think your input is about right for the average 340. I agree the 300 smk which I use quite a bit will just flat out run off and leave the others in the dust. In my light rifles it kicks like a mule though and although the lighter bullets do not compare with the 300 at longer ranges they have plenty to do the job as long as you can get a mid .5 bc up in the 3300 + fps range in 225+ grains of weight. If I am hunting an area where I may shoot around a 1000+ yards just take the beating and shoot the 300 grain.

Tikkamike, I am down at the hot springs south of you about 50 miles.
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Last edited by Long Time Long Ranger; 02-15-2010 at 06:33 PM.
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  #11  
Old 02-15-2010, 07:37 PM
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Re: need data and suggestions for 338 lapua

Oh well I drive through there every friday taking pumps down to wamsutter. I hunt elk over on Grass Creek just over the hill from you. ..Back to the 300 grain SMK's how are they for a hunting bullet? Do they retain weight well? Of coarse when your shooting 300 grains you can afford to shed a little weight.
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Get a JOB! I already feed the bears, I dont need to feed you too!

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Last edited by Tikkamike; 02-15-2010 at 08:45 PM.
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  #12  
Old 02-15-2010, 09:06 PM
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Re: need data and suggestions for 338 lapua

The biggest problem most people get with the 300 smk is not opening up enough. It will shoot completely through an elk at 1000 yards. Good long range bullet for elk, just kicks to bad in a light gun. Most of mine weigh in the 10-11 pound range scoped out with bipod.

Been in grass creek a few times and I have taken some really nice antelope down around Wamsutter.
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Old 02-15-2010, 09:18 PM
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Re: need data and suggestions for 338 lapua

Well I think I will try those suckers out. My grandpa owns the Box H ranch up by the HD and the LU Ranch. And Wamsutter has some monster antelope. I was contracting for Williams gas down there this summer in the Red Desert and saw some amazing goats.
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Mike

Get a JOB! I already feed the bears, I dont need to feed you too!

" Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad
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  #14  
Old 02-15-2010, 09:26 PM
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Re: need data and suggestions for 338 lapua

Quote:
Originally Posted by Long Time Long Ranger View Post
Jmden, I think your input is about right for the average 340. I agree the 300 smk which I use quite a bit will just flat out run off and leave the others in the dust. In my light rifles it kicks like a mule though and although the lighter bullets do not compare with the 300 at longer ranges they have plenty to do the job as long as you can get a mid .5 bc up in the 3300 + fps range in 225+ grains of weight. If I am hunting an area where I may shoot around a 1000+ yards just take the beating and shoot the 300 grain.

Tikkamike, I am down at the hot springs south of you about 50 miles.

Yeah, I think I'd be much more likely to shoot a 250 AB with a much better bc.
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"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God?" Thomas Jefferson - Notes on the State of Virginia

www.wildsidesystems.com - Shelter for Your WildSide - http://www.youtube.com/watch?v=tYwgo...&feature=g-upl
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