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6.5 140vld at 3300-3400fps???? need help

 
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  #1  
Old 10-22-2010, 10:06 AM
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6.5 140vld at 3300-3400fps???? need help

hey guys. i've done a lot of searching and maybe I've overlooked it, but I'm having a hard time deciding on caliber for a lightweight long range gun. i would like to push the 6.5 140 vld to 3300-3400. but don't even know if that's a possibility. i would like to avoid fireforming if possible.

I've got a heavy 6.5x47 lapua that is a blast to shoot, and a 14lb, 338-378 getting built for places where i'm just hiking a few miles. just sold my custom 300RUM that i loved, but was made an offer i could not refuse, and that's why the 338 is getting built

Now i have the bug to build a carry gun with finished weight around 8lbs. It will be topped with the NF 2.5-10x32 and would like to keep the barrel to 24" with no brake. 1000yds max, but realistically more like 800 with this setup.
Not really worried about barrel life, that's why i build my lapua, so i could shoot a ton and not worry too much about it.

i would love to hear your thoughts on caliber, speed, and how that would be conducive to a 8lb mid to long range setup.
thanks guys, i really appreciate you helping me organize my thoughts.
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Old 10-22-2010, 10:16 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

From what I am seeing, the velocities you want are going to require a long action. I checked on reloader's nest for some quick load data, but I really didn't look at barrel length. As per the velocities that I did see, 6.5WSM, 6.5 SAUM, 6.5x300 Weatherby mag, and probably the 264 Win Mag will give you those velocities or close too. Of the ones I named, I would probably go with the 6.5 WSM or SAUM. These two could be put into a short action if necessary.

Tank
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Old 10-22-2010, 10:27 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

thanks for the fast response. i'm just leaving for work, but will do some reading on the 6.5wsm and saum when i get back. that sounds like that may be a good option. I'll try to figure out what kind of velocitys guys are getting with a 24" barrel.
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Old 10-22-2010, 10:29 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

I can tell you for certain that a 6.5mm 140 going 3300-3400 FPS is going to EAT barrels alive. The 264 RM might give you 3100 with a 26" barrel. With the cramped bore space you are going to need a large case and a long barrel.

For those speeds at that bullet weight you are in 7mm RUM territory.

If it is flat shooting you seek, get a LRF and forget about how flat it is. If it is beating the wind you seek, you can do that with another caliber that will shoot higher BC bullets. With the 7mm WSM, you can run the 162 AMAX around the 3000 mark or the 180 VLD around 2800 all in a 24" barrel. These are wind busters for sure.

Let us know what you decide!

M
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Old 10-22-2010, 10:33 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

Quote:
Originally Posted by Michael Eichele View Post
I can tell you for certain that a 6.5mm 140 going 3300-3400 FPS is going to EAT barrels alive. The 264 RM might give you 3100 with a 26" barrel. With the cramped bore space you are going to need a large case and a long barrel.

For those speeds at that bullet weight you are in 7mm RUM territory.

If it is flat shooting you seek, get a LRF and forget about how flat it is. If it is beating the wind you seek, you can do that with another caliber that will shoot higher BC bullets. With the 7mm WSM, you can run the 162 AMAX around the 3000 mark or the 180 VLD around 2800 all in a 24" barrel. These are wind busters for sure.

Let us know what you decide!

M
+1 I agree, but he seemed to want the 6.5mm. Though the 6.5 WSM and 6.5 SAUM should do 3000 out of 24" wouldn't you think? Even at that speed it's still going to buck the wind pretty good.

Tank
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Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

Friends don't let friends develop canonitis!-chucknbach

arguing over the internet is like the special Olympics....even if you win, you are still...special!
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Old 10-22-2010, 10:36 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

I looked a lot at the 7mm 168's and the 180's, but the BC on the 6.5 140 was pretty stinking high, and the recoil would be less with that round as well to make it more comfortable to shoot without a brake (although that is not high on the priority list)

the 6.5 and 7mm is where this search started, and maybe i should not have eliminated the 7mm so quickly.

i completely agree with your comments about a LRF and not worrying about velocity. I have a swaro lrf, but i do like the added speed to increase margin of error on exact ranging and wind reading. not using it for an excuse to not practice more, but just for that extra margin, if i can get it.
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  #7  
Old 10-22-2010, 10:47 AM
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Re: 6.5 140vld at 3300-3400fps???? need help

When you find something let me know too, please.

I've got a Accumark 300Wby that has been sitting doing nothing for to long and is either going to get sold or made into a 6.5 overbore something.

I'm personally not a big fan of belted cases or the short fat cases like the WSM which is why I was thinking something like a 6.5-7RUM. But, it was brought to my attention that I would most likely need atleast a 30 or 30+ tube to get any kind of reasonable amount of gain it would be capable of. Bummer for me but it certainly makes sense.

If you do a 6.5 off a WSM case do they typically use the 7WSM case and neck it down from there? The 7WSM case, going by the #'s, looks to have the most case capacity of all the WSM's as well as would be a simple neck down to 6.5.

How well do these short fat cases with long bullets feed thru a long action and what kind of FPS do they get with the 140ish bullets????
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