Choosing a long range rifle

From the quote:
"It has an estimated averaged G1 BC of .794"

I am going to go out on a limb and say they average the BC based on real world performance.
 
old roper:
Bart B, So your saying you never seen the post about the 195gr Berger bullets and your not the Bart B that post on LR hunting site.
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I don't remember seeing a post on 195 bergers. Please post a link to that then I'll check it out.

But I am that person on LRH. I'll refresh my memory after checking out the LRH site.
 
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trg42wraglefragle suggests:
Quote:
Look at the ballistics off the 6.5 and 7mm cartridges. I would take one of them over 300winmag, the 300wm puts more energy on target but that's it, the smaller faster higher BC bullets tend to do better than 300wm in every aspect.
Is there any 6.5mm or 7mm bullet that has a higher peak BC than Sierra's 30 caliber 240-gr. HPMK bullet with .711? Their 142-gr. 6.5mm has a BC of .595. Their 180-gr. 7mm has a BC of .660.
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According to Bergers website the 180s get up to .674.
But in the rest of my post I said that unless you can send them at decent velocity the extra BC isn't worth it.
Therefor you need a bigger 30cal cartridge, which will in turn cost more to feed and the bigger 30cals tend to burn barrels very fast.
Yes some 6.5s/7mms will burn barrels fast too eg 6.5-284, but some of them don't.
 
I was thinking that the reason Berger was now giving G7 BCs was that they were based on a bullet profile closer to VLD and other sharp spitzer boattails so as to not need the "velocity band" kluge that Sierra uses to make a blunt flatbase ballistic chart work with SMKs.

The reason other bulletmakers don't use G7 is because the number is lower than even a poorly fitted G1, which makes for less impressive advertising.
 
Watched a test some years ago comparing Berger's 30 caliber 185 VLD against Sierra's 190 HPMK. 20 or more rounds were fired alternately so bore fouling and temperature were virtually identical for each pair of shots. Both left the .308 Winchester 26 inch test barrel at about 2560 fps. Two chronographs were used; one 15 feet in front of the muzzle and another 15 feet in front of the 1000 yard target. Average velocity difference down range between these bullets was 50 to 60 fps. The Sierras went through the 1/4" thick foil-covered foam boards at 998 yards the fastest.
 
I'm re-barreling my 7-08 to an 8 twist to handle the 162 Amax.
0.625 BC...very impressive for that weight bullet, light enough to push from a .308 cartridge. Even with the heavier 168 SMK it's less than a 0.5.

I bet it would really kick some azz from a 7mm magnum or SAUM.
 
I like the 6.5x284 but the .284 is just all around superior IMO.
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Not true, 6.5x284 will burn out barrels quicker.

Annoying thing is you can buy Lapua brass in 6.5-284 but not 284, which is kind of ironic, but annoyingly ironic if you have a 284.
 
I'm the kind of person that appreciates a challenge and therefore I've come to be my own worst critic. I've always strived for success and pushed myslef to extremes to master a variety of skills. As the years have passed, my passion for shooting for fun has grown into what some people have referred to as a 'sickness' in terms of striving for perfection when I'm shooting.
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Is that where you get your username from?

Anything in at least a .308 would probably work, though I am not all that experienced with long range shooting(not at all, actually.)explore a lot of options in a lot of calibers and see what works best for you.
 
old roper mentions:
Bart B here is the post on 7mm 195gr bullet

http://www.longrangehunting.com/foru...-bullet-85792/

Here something else that started on LR

http://bulletin.accurateshooter.com/...fers-analysis/
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I remember seeing the LRH post but never looked at its posts.

Never seen the one on Accurate Shooter before.

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Interesting comments comparing the 6.5x.284 with the .284 Win. While the 6.5 version will wear out barrels quicker and get perhaps 10% barrel life, it's better for shoulder fired accuracy issues as it's got less recoil during barrel time. And that's why the 6.5x.284's been so popular and successful in long range prone matches.
 
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jmr40 says the Army is currently in the process of rebarreling all of their 308 sniper rifles to 300 win mag. Are the existing rifles those with the 700 short action?
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The Army 308 sniper rifles are built on long actions making the conversion possible. The USMC 308 sniper rifles are built on short actions making such a conversion impossible
 
I should've put a :D after the barrel burning comment.

I don't have a 284 but my shooting mate is and hes using Lapua brass.
A bit of a pain having to neck turn after you size it up, at least you only do it once.
 
I had a chance to do some shooting this past weekend with my Remington 700 sps tactical heavy barrel .308.
This is the first opportunity I've had to shoot at these distances, and so I was quite pleased with my accuracy.
Distance = 860 yards
Rounds = 20 Hornady superperformance 178gr BTHP
Intermittent Crosswind = 8-10mph
Target = Fullsized steel silhoutte

With crosshairs dead center mass, my first two shots landed about 2" low and 3" right in a 4.25" group. I made the necessary adjustments and the next 3 shots were center mass right on target in a 4.75" group.
I fired 5 more shots center mass, with a group right at 5". Being as how I was getting decent groups at this distance, I decided to put the next 10 shots all in the head.
The next five rounds were headshots aiming for the bridge on the nose in a group of 3.75" with 1 flyer low right in the chin.
Five more shots aimed at the forehead area landed in a group of 4.50" right on target.

Now, I don't know how well these groups stack up to the 'norm' of long distance shooting...whether its, poor, good, great, or exceptional. I tend to think that for being my first attempt at this distance that I did great. The way I look at it, I could have had kill shots on my target 18 out of 20 times at 860 yards.

So, having stretched my current rifle to greater distances, I am eager to see if I can tighten up the groups even more. I would like feedback on my performance, so I know what I should be shooting for next go around this weekend.

Thanks
 
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The accuracy you've got looks pretty darned good. Here's something you can compare it to.

The 1000 yard benchrest rifles holding records for 6 or 10 groups fired have an average group size of a bit over 6 inches. And the conditions they're shot in are pretty good, too. As the benchrest folks don't like to let the rest of us know what their bigger group sizes are, one has to interpolate what they most likely are. Which means with the average of 10 groups includes some that are larger than the average. Statistically, the biggest ones will be about 50% larger; around 9 inches. Realistically, the big one could be even larger and the smallest one very small. Generally speaking, these record holding rifles and their ammo shoot about about 8 to 9 inches at 1000 yards (8 to 9 tenths MOA) and a small percentage of their groups are down in the 2 to 3 inch range; these are the ones that when fired in single group matches win them and sometimes set records.

At 860 yards, 9/10ths MOA is 7.74 inches. 5 inch groups at 860 yards hang in there very well with the best of them.
 
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