260rem to 6mm creed

[Rob01]

i know you know your stuff when it comes to all of this and I respect that but(and not being a smart a$$ it's an honest question)if the 6.5mm is all that then why are more shooters shooting 6mms over the 6.5mm? Especially since the 6.5mm has better barrel life.

Just a tidal shift. Back in the 2005-2008 the .243 was THE round to use. Then the Creedmoor came out and people started shifting back to the 6.5s including the .260, which was in limited use around 2003-2005 mostly by Terry Cross. Then the 6mm Creedmoor came out and did what the .243 did but with a little less powder in a better case design and people started going back to 6mm. It goes back and forth as they both work equally well. It comes down to the shooter.

What length barrel you have on that .260? I run 27-28" on my Creedmoor and it's easy to get that speed.

[LongRange]

That's what I figured after talking to others and lots of reading.

24" on the last two...I've shot from 30" down to 24"...I could of pushed it up to 2800-2850 but it was so accurate at 2720 and the ESs were in the 6-8fps range...plus I chased velocity for several years and have found that fast isn't always consistently accurate and is hard on things.
i had a krieger chambered the same time I had the bartlein chambered that I just pulled...I was shooting 130g Berger hybrids at 3050fps with RL-17 it lasted 741 rounds before I started having issues...long story short...my smith sent it back to kreiger and they are looking at it...hoping to get an answer back this week.

i have no illusions that the 6mm is going to try me into David tubbs lol but I do think it's going to improve my scores and if not I'll go back to the 260...the bartlein I just pulled only has 219 rounds through it and a stupid accurate load worked up.

[Rob01]

Yeah speed is hard on things but I want the most of my match rounds I can get for speed and accuracy. No reason running a top fuel dragster at 55mph Obviously going fast and not accurate isn't the best thing but usually having over 2800fps in a 6.5 Creedmoor or .260 isn't a hard task. 741 rounds is a very short life. Must be something wrong with that barrel. My first Creedmoor barrel went about 2300 rounds before the throat started to go and that was with 140s between 2825 and 2900fps.

The 6mm Creedmoor might very well help with less recoil and better performance than your .260. It's a very good round. You should get close to 2000 rounds before you start having issues with the throat. Good luck with it. It should serve you well.

[LongRange]

No reason running a top fuel dragster at 55mph

LOL thats funny...and hard for me to stop doing...ive always looked for speed but am trying to balance things between speed,consistent accuracy and life of components...i will shoot it at 3050 for a match or two and see how it preforms and if not up to snuff ill run it up faster...42gs is probably right at 3100 maybe 3150 now.

theres a short range tactical match here on the 16th ill shoot in and post back with thoughts on how its running...and if i can get 1800 rounds id be very happy with that.

yes there was something wrong with the kreiger...there was a loose spot right about the middle of the barrel....it was VERY accurate for those 741 rounds at 895 it was throwing fliers pretty bad....kreiger agrees that even running it with the 130s that fast the barrel should of lasted at least twice as long...ill post up what they say.

[rjtfroggy]

LR I'm not versed on the 6 Crede but when setting up the 243 Win. the guy at Berger told me to shoot for right around 2900 fps with the 105's. He was right on the money, at 2890 it shoot most days in the mid to upper teens at 100. Problem was the barrel burned out at 1440 rounds.
Now with the 6 br I'm at 2709 with the 105 target (not hybrid) and it is high teens to very low 2's.
Maybe try a little slower when trying different seating depth.

[LoneWolf]

1400-1500 is what's expected as far as match quality rounds with a 6mm. The speed is what gives it the advantage over the 6.5. If you're going to run those speeds might as well run a 6.5...

Sent from my 710C using Tapatalk

[rjtfroggy]

LoneWolf I'm almost at book max with IMR 4895 and would have a hard time stuffing more in the BR case. Right now I have single digit ES and tiny groups so I satisfied where I'm at.

[LoneWolf]

That's the limitation of the BR case. The Dasher has been performing well as it hits the 3000fps mark, but you need a CRF action to run it from a mag and lots of fire forming. The node for the 105 hybrid as well as the DTAC is in the 3050 range. Some run 3100-3150, but it gets squirrely to often and easily for my taste at those velocities!

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[Rob01]

Around 1400 rounds doesn't seem like much at that slow speed with a 105. My last .243 I shot the 115s at 2990fps and was at 1880 rounds when I sold it and it was still a 1/2 MOA shooter. I am shooting my .243 now with the 105 BTHP at 3080fps with H4350. We will see how long it goes but I am expecting closer to 2000 rounds.

[rjtfroggy]

It still shot .5 but in short range BR you need to be in the teens or low .2's.

[Rob01]

I didn't know you were running it in BR comps. Thought the BR came up as talk about the 6BR cartridge.

[LongRange]

Rob what barrels are you running?

[Rob01]

I run Bartlein barrels. Been very happy with them.

[LongRange]

Me as well...very happy with bartlein.

[LongRange]

after loading a few rounds last night and feeling the difference in felt seating pressures i decided to clean up the necks on this brass...these two pieces are the two extreme spreads with a few close to the same and most falling somewhere in between...i measured several pieces and set my tool to just clean up about 30-40% the necks but as you can see some of them were much thicker than others...these two pieces were 2xs fired,FL sized,annealed and trimmed to 1.917 and all from the same lot...my ESs where averaging 16fps with no case prep so im expecting the ESs to drop into the single digits(or close)now with a more uniformed neck tension...

well the videos arent working so heres a crappy pic...

[LongRange]

well not in the single digits but dropped 6fps off...from 16fps down to 10fps.

so #2 and #4 are 41.5g H4350 105g berger hybrid .030 off the lands CCI200...i shot #2 first 3063 3053 3058...



took the magneto speed off and shot a 3 shot group at 425yds...the 3 in the orange...put the magneto speed back on and shot #4 3055 3056 3062 took the magneto off and shot 3 more at 425yds 3 lower ones...the wind was up to about 15mph and coming straight at me as you can see from the flag....

[Rob01]

Looks like it's shooting good but are you basing you ES off of only 3 shots?

[cowtownup]

Are the pink stickers 1" diameter? I'd say that is shooting in the 2's easy...

[LongRange]

No 6 shots for now...3 shots over the chrony then 3 at 425yds W/O the chrony then 3 over the chrony then 3 at 425yds W/O the chrony with only time to take the bayo off and put it back on...I'm still doing a little fine tuning...the bergers like .030 off and I'm going to drop .1g and increase neck tension from .002 to .003 and shoot some groups tomorrow.

i know better than to base speeds or groups off 3 shots...once I'm happy with how it's shooting I'll shoot 10 over the chrony and a 10 shot group at 425 or 550yds tomorrow...not supposed to be so windy tomorrow.

[LongRange]

Are the pink stickers 1" diameter? I'd say that is shooting in the 2's easy...

their 3/4"...the increase in neck tension and .1g drop in charge weight should tighten everything up.

[cowtownup]

[cowtownup]

Or is the steel target at 425 and the pink dot target at 100?

[LongRange]

Thanks CTU...I know this rifles got just a LITTLE bit more in it.

[LongRange]

Steel is at 425 paper at 100yds

[cowtownup]

10-4... I had the distance set at 425 on measuring those groups on paper... Where have you been finding your brass for that rifle?