Overbore4life

Member
Joined
May 29, 2019
Messages
11
Location
United States
Hey y’all!

So basically, some time ago, I got into long range (ultra long range)...ended up building a 338 lapua improved...I got an offer that I couldn’t refuse and now the money’s burning a hole in my pocket. Just kidding, but I’m going to pull my hair out if I don’t get back to shooting. I’m getting off track so back to the point.

I lost the whole rifle system except the scope that my girl gave me. ‘I just didn’t wanna get my head chopped off, shhhhh.’ No, but seriously, I love it. Has always been my favorite. But anyway, it’s a Hensoldt 6-24x72 with an adjustable base and bc01 computer. Basically, if you’re not familiar, a 2 mile setup.

Now to the rifle, I’m looking for a super-flat-shooting caliber for Ulr. I know everyone’s jumping on the 6.5 hype right now BUT and this is a big ‘but’ ;) those bullets are great supersonic but when they get to the transonic/subsonic range, you might as well be shooting without a scope.

Now, from what I’ve been reading the past few days I’ve come to the conclusion that the perfect diameter comes in at 7-8mm. Now, from experience I think the 8s are getting a little bit heavy for flat-shooting...I might be wrong?!

TiborasaurusRex, a guy who knows “some” stuff about this, went for a 7-300 for his elr build but that’s not overbore and almost always super-flat-shooting = overbore.
But despite that, that probably means 7mm is a great diameter. On the other hand around 7.62mm has a little more ‘consistency’ let’s say - (trying to keep it PG13) kind of like a woman’s behind It shouldn’t be too skinny, neither too you know... Just right. (I hope my post doesn’t get removed for sexual content Guys, I said ‘behind’) :)

28 nosler, 7mm STW, 7mm RUM, 7.21 Firebird, 7mm Allen Magnum...
7.82 Warbird, 30-378 Weatherby Magnum, 300 raptor...
Just to name a few...so many more, so much to choose from and so little idea on which one to choose...

Some more info on the gun, it would be magazine fed but with the new ~4.0” mags that’s not an issue...
Going to use that scope I talked before plus a Sako TRG bipod with the conversion kit for other chassis and I’m looking at getting a supressor/brake combo like those from the new Barrets - so I can get a much quieter noise without taking the full hit on the shoulder.

About the recoil and the fugacious barrel life, I wanna point out this won’t be a bunch-o-shot a day kind of rifle. Maybe I’ll take it hunting someday but not to shoot pigs out of a helicopter. Just kidding, it would look so dumb, could you even imagine?

I hope y’all aren’t tired of reading my long post :)

Feel free to comment since I’m about to pull my hair out and all help is great :)

Take care,
VP

P.S.: I know the title says Elr and I’m doing a Ulr build but since the two terms most of the times cross over each other...and there were no Ulr topics on lth... I entitled it ‘New Elr build.’
 
Last edited:

yorke-1

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Joined
Jul 5, 2008
Messages
1,213
Location
Clearwood, WA
The 375 and 338 XC are great rounds, but still come up short of the CT cases. The 375 Allen Mag is an excellent performer but it’s nothing more than a proprietary version of the 375 SnipeTac. The standard 375 CheyTac will give more performance that 99% of shooters need with more brass options and no fire forming.
 

yorke-1

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Joined
Jul 5, 2008
Messages
1,213
Location
Clearwood, WA
funny thing about ELR is once you start shooting 2k you want 2.5k, then 3k....ect. It’s a sickness that just keeps getting worse

Spotting impacts and splash at these distances is tough. The bigger bullets make bigger splash making it easier to spot and less wind drift
It’s awfully hard to miss the impact of a 375 bullet inside of 2500 yards.
 

Overbore4life

Member
Joined
May 29, 2019
Messages
11
Location
United States
funny thing about ELR is once you start shooting 2k you want 2.5k, then 3k....ect. It’s a sickness that just keeps getting worse

Spotting impacts and splash at these distances is tough. The bigger bullets make bigger splash making it easier to spot and less wind drift

It’s like drugs...but that feeling when you get that ding! Right after you think...Now I need to get that a little bit farther...
 

Overbore4life

Member
Joined
May 29, 2019
Messages
11
Location
United States
The 375 and 338 XC are great rounds, but still come up short of the CT cases. The 375 Allen Mag is an excellent performer but it’s nothing more than a proprietary version of the 375 SnipeTac. The standard 375 CheyTac will give more performance that 99% of shooters need with more brass options and no fire forming.
I know...

Correct me if I’m wrong but 375 SnipeTac is a little bit improved over 375CT. Same goes for the 375 Allen Magnum, just a tad better that the 375 SnipeTac. Right?

I just wanted to get a fire breading small-ish round...

I know you guys recommend going for one of those 375s still tho... I don’t know :) (plus, it handles the transonic and sub like a champ)
 

jasent

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Joined
Nov 16, 2010
Messages
648
Location
deer park, wa 99006
If you have your heart set on a 7 mm or the likes get it. Just know that spotting is going to be tougher. Heck I’ve shot my 243 at a mile but spotting impacts or splash is very tough unless conditions are perfect
 

Dialing Long Distance

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Joined
Dec 22, 2014
Messages
91
Location
Upstate New York
If you have your heart set on a 7 mm or the likes get it. Just know that spotting is going to be tougher. Heck I’ve shot my 243 at a mile but spotting impacts or splash is very tough unless conditions are perfect
He’s right. I’ve taken my 6.5 out to a mile and it’s the same thing, spotting impacts is hard. VERY hard most of the time at a mile. Doubling that range (and more) with a 7mm will be even more challenging. If you see the guys shooting ULR, King if 2 miles, and the like, those guys are using big bore rifles for a reason. The 375’s, 408’s, 416’s, and 50 BMG are the most popular rounds. Smaller than that is not what those guys are using. Even the awesome 338LM, which, will do the job (probably better than any 7mm in my opinion, and I love 7’s) is in the minority in the 2+ mile game. I think the very smallest caliber I seen on King of 2 Miles was a 300WM. And while it shot well, it was really at the end of its reach at less than the 2 mile mark.
 

yorke-1

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Joined
Jul 5, 2008
Messages
1,213
Location
Clearwood, WA
I know...

Correct me if I’m wrong but 375 SnipeTac is a little bit improved over 375CT. Same goes for the 375 Allen Magnum, just a tad better that the 375 SnipeTac. Right?

I just wanted to get a fire breading small-ish round...

I know you guys recommend going for one of those 375s still tho... I don’t know :) (plus, it handles the transonic and sub like a champ)
The difference in capacity between the standard CT and the SnipeTac is pretty significant. The difference between the SnipeTac and Allen Mag is much less significant. The reality is that the improved CT cases all shoot best at around the same velocity, so the extra capacity doesn’t offer much benefit.

I have much more first hand experience with the 338/408 CheyTac improved case than I do the 375 versions but I still have a couple hundred through the big 375s. The 338 SnipeTac, Allen Mag, Big Baer and Extreme all have different case capacities but are capable of hitting 3300+ fps with a 300gr bullet. Most of the time though they all shoot best around 3200 fps. The 375 versions are in the same velocity range with 350gr bullets.

They’re all good options, just pick your brand loyalty and you’re good to go.
 

alcesgigas

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Joined
Jun 26, 2011
Messages
464
Location
Bettles Field, AK
Great thread/post; enjoy. Focusing on the ethereal two-mile quest and mindful of all the good suggestions regarding cartridges there's two areas that haven't been explored so far in my view. First there's the custom builder as I think there's but one production rifle that is made purposely for the long reach--it's a barrel-swapper too--that's Desert Tech's HTI. There's at least two DT specialists that tune these babies beyond their already standard delivered accuracy. Not sure if Accuracy International gets into the heavies or Amp's DSM-1. I'd just as soon refrain from being more specific due... The other area is logistics and by that I mean if an army runs on its belly these far reaching smoke poles run on barrels, bullets, and brass. Nobody is going to take the ultra--OCD--care in cartridge prep, loading, etc., as you to not-so-simply must be to truly enjoy shooting, taking a coffee break, then listening for the bellow... Top flight scales, a borescope, need I say the best chronograph you can get, select choosing and monitoring propellant (s) as to batch numbers, and the very best TOOLS TO MEASURE your efforts. For me all this is passion, perfection, and, well, sure, poverty threatens too. Then there's extreme patience, attention to detail, perseverance of course and doing one change at-a-time... Just look at all the trouble we struggle to get into! But, I'm sure, that like most others on this site, are all too familiar with these things; just thought to remind and well, all the best in your venture. The challenge never leaves.
 

RH300UM

Well-Known Member
Joined
Aug 25, 2008
Messages
1,178
Location
Southeast Idaho
Hey y’all!

So basically, some time ago, I got into long range (ultra long range)...ended up building a 338 lapua improved...I got an offer that I couldn’t refuse and now the money’s burning a hole in my pocket. Just kidding, but I’m going to pull my hair out if I don’t get back to shooting. I’m getting off track so back to the point.

I lost the whole rifle system except the scope that my girl gave me. ‘I just didn’t wanna get my head chopped off, shhhhh.’ No, but seriously, I love it. Has always been my favorite. But anyway, it’s a Hensoldt 6-24x72 with an adjustable base and bc01 computer. Basically, if you’re not familiar, a 2 mile setup.

Now to the rifle, I’m looking for a super-flat-shooting caliber for Ulr. I know everyone’s jumping on the 6.5 hype right now BUT and this is a big ‘but’ ;) those bullets are great supersonic but when they get to the transonic/subsonic range, you might as well be shooting without a scope.

Now, from what I’ve been reading the past few days I’ve come to the conclusion that the perfect diameter comes in at 7-8mm. Now, from experience I think the 8s are getting a little bit heavy for flat-shooting...I might be wrong?!

TiborasaurusRex, a guy who knows “some” stuff about this, went for a 7-300 for his elr build but that’s not overbore and almost always super-flat-shooting = overbore.
But despite that, that probably means 7mm is a great diameter. On the other hand around 7.62mm has a little more ‘consistency’ let’s say - (trying to keep it PG13) kind of like a woman’s behind It shouldn’t be too skinny, neither too you know... Just right. (I hope my post doesn’t get removed for sexual content Guys, I said ‘behind’) :)

28 nosler, 7mm STW, 7mm RUM, 7.21 Firebird, 7mm Allen Magnum...
7.82 Warbird, 30-378 Weatherby Magnum, 300 raptor...
Just to name a few...so many more, so much to choose from and so little idea on which one to choose...

Some more info on the gun, it would be magazine fed but with the new ~4.0” mags that’s not an issue...
Going to use that scope I talked before plus a Sako TRG bipod with the conversion kit for other chassis and I’m looking at getting a supressor/brake combo like those from the new Barrets - so I can get a much quieter noise without taking the full hit on the shoulder.

About the recoil and the fugacious barrel life, I wanna point out this won’t be a bunch-o-shot a day kind of rifle. Maybe I’ll take it hunting someday but not to shoot pigs out of a helicopter. Just kidding, it would look so dumb, could you even imagine?

I hope y’all aren’t tired of reading my long post :)

Feel free to comment since I’m about to pull my hair out and all help is great :)

Take care,
VP

P.S.: I know the title says Elr and I’m doing a Ulr build but since the two terms most of the times cross over each other...and there were no Ulr topics on lth... I entitled it ‘New Elr build.’
Check these out!

https://rbrosrifles.com/the-rbh-cartridge-family/
 

John Klingenberg

Well-Known Member
Joined
Nov 13, 2018
Messages
567
Location
Michigan
Another aspect I run into out here in the sticks is...a spotter, shooting partner with any modicum of knowledge. I have miles of fields to shoot over but no one is obsessed like me. You gotta have someone that shares your passion and knowledge of the sport. The only option is to invest in a high quality camera to record your impacts, otherwise you're ****, um I mean...shooting into the wind
 

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