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Why is 7mm not good in long range competition?

 
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  #1  
Old 10-13-2004, 10:42 AM
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Why is 7mm not good in long range competition?

I am thinking about averages, as I know there must be a few extreme range 7mm guns.
But as you look at the results of 1000 yard competitons it is mostly .300 mags or 6.5's?

It seems a bit of a mystery to me that 7mm bullets usually have higher BC's but are not extreme range winners, can someone let us know what is going on with this?
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Old 10-13-2004, 10:55 AM
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Re: Why is 7mm not good in long range competition?

The 7mm is a wonderful cartridge and you will see more representation at the LR matches in the future. problem is recoil and available bullets.

Really good bullets are coming on line that have BC equal/better then the 30cals. Now this helps with recoil in a heavy class.

In a light class, the 7mm heavy bullets have more recoil then the 6.5. The 6.5 also has a great head start in available bullets/tech.

The 6mm is also making headway with new bullets allowing this cal to shoot well at LR.

Shooting is slow to change and as long as the winners use a particular cal/cartridge, others will follow.

A 7mm WSM in a 28 to 30" barrel launching 162 AMAX/SST to 180gr custom bullets is going to work great in a heavy gun at 1000yds.

Jerry
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Old 10-13-2004, 12:01 PM
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Re: Why is 7mm not good in long range competition?

I am the proud owner of a 28 inch target barreled 7mm wildcat STW. The standard production shells fire form to fit my slightly larger case dimensions.

I bought it from someone who had it built to compete in 1000 yard competitions. He was never satisfied with the results. He told me that the .30’s and .338’s would always be a better choice. So he sold it to me and moved up to the 50BMG with a 42 inch barrel.

It’s just an excellent gun. I use 175 SPBT’s and run them in my media tumbler to moly coat all the bullets it gives them a needle point for maybe a slightly better BC. I have done very well in 600 yard meets. I have not bought any of the 180’s referred to by the other poster. I mainly use mine for hunting these days. 5.5 X 22 nightforce scope.
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Old 10-13-2004, 12:14 PM
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Re: Why is 7mm not good in long range competition?

7wsm set the mile accuracy record with 180 bergers not too long ago. Most folks have tried the 7 and don't quite get the accuracy as with the 6.5 from what they say. I'm still working on a 7wsm for a 1000 yard prone only gun. I am pretty sure it'll work as teh guy that used it for the mile record reports on his 2-3rd barrel still getting 5 inch groups at 1000 pretty easy. Maybe the case size has been found.

Jeff
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  #5  
Old 10-13-2004, 03:32 PM
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Re: Why is 7mm not good in long range competition?

So at extreme range with hunting bullets like Scirroco, TSX, SST, Accubonds, etc., the 7 WSM may be as accurate or possibly more so than the .300 Win Mag.?

[ 10-13-2004: Message edited by: StrayDog ]
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Old 10-13-2004, 03:56 PM
 
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Re: Why is 7mm not good in long range competition?

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>7wsm set the mile accuracy record with 180 bergers not too long ago. <HR></BLOCKQUOTE>That has since been cut almost in half by a 30cal
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Old 10-13-2004, 04:56 PM
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Re: Why is 7mm not good in long range competition?

Straydog, for the same weight of bullet (165 to 180gr) and similar muzzle velocities, the 7mm offers a substantial increase in wind bucking ability and retained vel over the 30cals.

Where the 30cals have an advantage is in very heavy VLD bullets (210 to 240gr). Here the impact energy is usually higher and wind bucking is similar.

You need to define extreme range. For me, that is well over 1000m. Here I will only shoot the heavy 30's and better yet, the 338's. You need all the energy you can deliver to the target.

If you are just target shooting, a high vel 7mm or 6.5 will do very well at ranges as far as you have elevation for.

Any shortcomings in the 7mm for target shooting will be solved as better bullets and tech are developed. You never know with some upcoming interest in 8mm, this may also become a viable caliber.

Jerry
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