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Originally Posted by DanAdair
Not to derail this one....

You must've used a reamer on that one that wasn't SAAMI? Or, you're jam seating them Scenars .030" or so? I'm betting thats a "Tactical 260" reamer that got used?




Also, give RL19 a whirl, if thats the longer throated reamer (with a gentler half cone angle) you should be allright up into 45.5-46 grains.


George built two .260's for me at the same time and I'm just waiting for a scope for the other one witch is a lightweight rifle, very simalar to my "Edge" stocked .308.
Both chambers were cut with minimum freebore...2.800 COAL is .010 off and 2.820 COAL is .010 in with both the 123gr scenar and the 139gr scenar. From looking at the throat with my borescope it is apparent he used a gentle slope angled reamer to finish the throat. That should allow me some peace of mind if I feel I need to get into the rifling. In almost all of the shooting I've done with various Lapua bullets,(scenars) I've found they shoot very well "jumped".


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One thing about hunting in Africa, it taught me was to travel light and quiet,get close,than a little closer..only thing I care to shoot beyound 300 yards is a groundhog...but that's just me.
I have a AO scope on a .264,that I still have questions about....rifle
Nice looking rigs,guys!

Last edited by rifle; 06/19/10.

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Huh... I didn't think the Scenars would be that much longer (sharper) than the VLDs. But the fact that it shot them that well told me it wasn't a SAAMI reamer either way wink

And to ammed my earlier post, if you're only jumping them .005", I'd stay towards 45 grains of RL19 towards the top end (unless you're a moly junkie)

I used to do spooky things with 142 SMKs in my last 260 laugh


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Dan, How did those 142 SMK's work for killing critters? And what was your twist?

Weather cleared off here this morning so hopefully I can do some more testing asap...10K race at Fort Peck this morning.....ouch!!


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i haven't had much luck with 142s in anything twisted slower than 1:8.5" at .264 WM velocities.

never tried the 142s on game, but i can advise against the 120 SMK at warp speed.


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Pat, how is the Hensoldt scope comparing to your S & B units?


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Mark, you might also try searching some of "sscoyote"'s stuff on here and in other long range forums.

He's a good friend of my brother in Colorado and a ballistics and scope wunderkind. I'm way right brained and have a hard time keeping up with his math, but wish I could have about two weeks with him to learn his system using reticle subtensions, dots, mil-dots, etc. He uses a Leica bino/rangefinder does the math and gets hits very quickly without spinning turrets.

He's big on the single shot specialty pistols and making long range varmint shots with them, but shoots rifles a lot, too.

Last summer 40 miles east of Pueblo, he handed me his custom 26-in. AR in .223 AI with a Weaver V16 with some sort of custom dot system and told me how to hold on a PD I could not see with my naked eye and had a hard time finding with binos.

I trusted him, squeezed real careful and luckily slipped one thru the PD's noggin at 530 yards! I know such hits may be routine to a lot of y'all Westerners but that was the longest hit on a critter I've ever made.

Anyways, he could probably figure a way for you to make regular hits way beyond Ft. Mudge with your Mashburn.

P.S. I'm just gonna spend time trying to figure out how to twirl a Leupold 3.5-10X M1 dial on my LTR this summer.

Last edited by ColdCase1984; 06/19/10.

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Originally Posted by scenarshooter
Dan, How did those 142 SMK's work for killing critters? And what was your twist?

Weather cleared off here this morning so hopefully I can do some more testing asap...10K race at Fort Peck this morning.....ouch!!


Never killed any game with them (unless varmints and coyotes count) and I ran them in a 1:8 twist. They'd group 5 into an inch at 100, and 200, and by 300 they'd open up to 1 3/4" laugh So I'm not thinking I had any issues with stability.

10K??? That doesn't sound fun at all frown Maybe I'll see you at the Grizzly Man next year.


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Another test target from just a few minutes ago....wind went down nice.

I shot better than I ran today!....grin! (3rd in my age group)


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Pat, fine shootin', 3rd sounds pretty good!

I just got in from shooting also, little breeze but pretty damn nice. [bleep] mosquito's are thick as thieves though, I'm sure you don't have any over on the Milk....(grin)

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300WSM(A7/6x42LR) and 175 Nosler CC's at 503 yards. Held about 4" to the right but it wasn't quite enough.

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Originally Posted by scenarshooter
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Another test target from just a few minutes ago....wind went down nice.

I shot better than I ran today!....grin! (3rd in my age group)
But they aren't centered... wink You keep this up and I'm gonna really be jonesing for a .260 even more than I already am. Very nice!! I'd be interested in any on critter reports with the 6.5 scenars.

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Well if they work like the 105's in 6MM, the 155's in .308 or the 250's and 300's in .338 they will be fine on antelope and deer sized animals.

I printed up some JBM charts last night and I'm heading out to try it at 600 meters.

Sam, good shooting there....looks like Roosevelt County.


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I can't imagine they wouldn't work, but IIRC some folks here reported some lack of expansion problems with the 123gr version years back. Heavy on the IIRC...

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Originally Posted by scenarshooter

I shot better than I ran today!....grin! (3rd in my age group)


If you run like you shoot Pat, you ought to turn pro.....

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Originally Posted by GSSP
""I'd love to see a side by side contest between 2 shooters. One hold over, and one turret twister. Between 3-400 yards, with paper plate sized targets, at random ranges (like 324, 345, 371, 395) It would be interesting to see which method produced the most precise hits at those ranges.""


Calvin,

On a monthly bais I shoot with a bunch of guys & girls who shoot sniper/tactical stuff. One of the events we shoot is basically what you describe. We shoot an 18" plate @ 200, 300, 400, 500 and 600 yds; timed. When I first started doing it, I twisted my NF turrets and it took me around the 50's in seconds. When I figured out how to run it with my NP-R1 reticle, holding over I cut my time down into the 30's. We a few guys who with their reticle run the 5 targets down into the mid teen's for seconds; their smokin!!!!

Hope this helps.

Alan



Got to the range, did time trial with a dirty bolt and rails. Shot @ 210, 330 and 434 (would of gone to 6 but 434 is as far as our range goes). Used my 7 Mashburn Super, off the ground, on a bipod (which is how I use it for long range work). The big 7 bounces me around a bit more than my 7/08 or 270 so it takes a few extra nano seconds to reaquire the targ. I ran it 3x and my times were tween 6-7 seconds all 3 times.

Pretty sure if I had the extra targs @ 500 and 600 that I'd be plus or minus 10 seconds with a gun that held 5 rounds. It might take me a skosh longer with my Mashburn as I'd have to stop to reload...something not too uncommon for me and the way I shoot though.. grin

Good morning at the range

Dober

(side note, took a dotz virgin to the range with me, he pounded the steel and is off to buy his first dotz scope as we speak...grin)


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