.260 Remington

diggler1833 · Apr 22, 2025

I shot (5) more of the 130gr Norma just now @ 250 yards. I split the seating depth difference, and managed a 1-1/4 to 1-1/2 inch group (can't tell what is an old mark and what is new on this target)...so about a half-minute again and in-line with the 100 yard tests from yesterday.

It took .6 to get there, so I might be going a bit faster. It'll be a couple weeks until I take this to 650 and know for sure.

Same load data from post #443 above.

lash · Apr 22, 2025

Yeah, I did like that I could use .5 at 200 and 1.1-1.2 at 300. Easy peasy.

Dogsniper · Apr 22, 2025

45 gr. H4831 and 142 smk 24” barrel

Dogsniper · Apr 22, 2025

H4831 sc and 147 eld out of a 20” barrel

diggler1833 · Apr 23, 2025

You just made me realize that I'm sitting on about 7.5lbs of IMR-4955 (H4831 equivalent). Might have to do a little testing with that down the road.

TBH, I have the 4955 because it shoots so well out of my 7RM with 150gr bullets.

Dogsniper · Apr 23, 2025

diggler1833 said:
You just made me realize that I'm sitting on about 7.5lbs of IMR-4955 (H4831 equivalent). Might have to do a little testing with that down the road.

TBH, I have the 4955 because it shoots so well out of my 7RM with 150gr bullets.

I like h4831 I get the velocity I want without the early pressure spikes that h4350 give me in 260

lash · Apr 23, 2025

Dogsniper said:
I like h4831 I get the velocity I want without the early pressure spikes that h4350 give me in 260

Both SC and regular cut? Or just SC?

diggler1833 · Apr 23, 2025

Dogsniper said:
I like h4831 I get the velocity I want without the early pressure spikes that h4350 give me in 260

N160 is right there with burn rate as well. You'll most likely compress the load before you run into pressure signs.

Dogsniper · Apr 23, 2025

lash said:
Both SC and regular cut? Or just SC?

Both

Gogga · May 12, 2025

I think I've found my load for now, 44.0gr N555 with a 142SMK @2733. Shooting small and seems to do well in the wind. The TAC A1 seems to be throated perfectly for this bullet at 2.895. At 130 rounds down the barrel it seems to be settling in now. It also amuses me that most of the people I shoot with have no idea what 260 Remington is

diggler1833 · May 12, 2025

Gogga said:
I think I've found my load for now, 44.0gr N555 with a 142SMK @2733. Shooting small and seems to do well in the wind. The TAC A1 seems to be throated perfectly for this bullet at 2.895. At 130 rounds down the barrel it seems to be settling in now. It also amuses me that most of the people I shoot with have no idea what 260 Remington is

Hopefully you hit them with the "master race" knowledge...

Gogga · May 13, 2025

diggler1833 said:
Hopefully you hit them with the "master race" knowledge...

You mean, "Like a 6.5CM but better"?

lash · May 13, 2025

Gogga said:
You mean, "Like a 6.5CM but better"?

Gogga · May 13, 2025

It amazes me how badly Remington got the marketing wrong. I've come late to it and it feels like cheating compared with .308! The nice thing is there are no brass concerns as it's easy enough to make from other very common brass.

Has anyone ever tried necking it to 25cal? Yes I know that's basically 25 Souper but .264 to .257 would be very simple.

HarryPope · May 14, 2025

I’m sure it would be easy, but the first question is….why? I have been a big .257” fan for many decades, but when the .260 was introduced I got one (two actually) because the two bullet diameters are for all practical purposes the same. Plus the .260 had - and still has - a much wider range of useful bullet weights. Today there are more .257” bullets in heavier-than-traditional weights, but the real world differences between a .257” and .264” 120 grain bullet are miniscule.

All that said, why not?

.

diggler1833 · May 14, 2025

Man, the new .25 CM fans who get told what to buy from all the shills would crap their pants if they knew how easy it would be to just neck down and go. Honestly, I'm now getting tempted by the idea to do this. You'd need about 2.900 to 2.950 to really get it cookin'.

Call it the ".25 Master Race".

Gogga · May 14, 2025

I'd be very interested to see what it would do with the heavy 25's, 138gr A-Tip over 3k...

diggler1833 · May 15, 2025

Well, there is the .25 Souper...but looking at the reamer specs again on PTGs site, the freebore looks extremely short (like it was obviously designed before the long, heavy-for-caliber bullets came out...kind of like the .260). I couldn't find it, but I bet it was also designed for 2.800 OAL with those ~100-117gr bullets.

Kick that freebore out .100 and it would be a "game changah". Not really, but it shouldn't have any trouble running those mid-130s bullets up around 50-100 FPS faster than the .25 Creed.

diggler1833 · Thursday at 1:28 PM

Shot a quick 5-rounder at 650 yards to verify that my old, cheap chronograph was giving me a correct reading of 2,800 FPS...it was dead-on.

The load (I cut the seating depth difference):

And when I verified that it wouldn't suck at 250 a couple weeks ago (about a half-minute again):

2,800 FPS

Sako TRG A1 (26")
130gr Norma GTX
44.8gr N160
Fed 210
2.295 CBTO

Gogga · Thursday at 1:54 PM

Shooting really nicely, shame my TAC A1 isn't 26". Tikka seem to want to stay at 24" or less. That said 260 shoots really well. What's your preferred bullet weight?

diggler1833 · Thursday at 6:33 PM

Gogga said:
Shooting really nicely, shame my TAC A1 isn't 26". Tikka seem to want to stay at 24" or less. That said 260 shoots really well. What's your preferred bullet weight?

I tried two boxes of factory ammo to sight in and start the breaking in (I don't really break in a barrel much). One box was factory Hornady 130gr ELD-M, the other was Sako 136gr Scenar-L. The 136s didn't shoot all that well...about .8ish.

So all I've done is start load development with the 130gr ELD-M, and then transfer the powder charge data to the 130gr Norma. I've got about 180 rounds through the rifle so far. And at this point, I think I'm done with two bullets that I have quite a few of on hand.

Sako/Tikka barrels are usually slower than cut-rifled...so it'd be stupid to chase velocity. That bring said, I have two 6.5x47s which shoot the 123 - 130gr stuff around 2,800 too. And that is also why I have a bunch of .264 projectiles laying around.

I've a preference for 123 - 130gr stuff in the standard 6.5s (also have a couple Creedmoors on top). I don't really shoot past 650 much, and I'm also frequently trying to kill something quickly between 150 - 350 yards. I'll gladly give up that couple of tenths of wind at 1K in order cut a tenth of elevation off at 300...because I don't have time to accurately range. Why not a fast 6mm? I have two of those two

.

That 130gr ELD-M at 2,750+ is a hammer on stuff under 100lbs, and it opens up on small stuff too. It is very much a goldilocks bullet.

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.260 Remington

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