6mm-284 Loads

[newmexkid]

Looking for current loads, (type of powder) for the heavier bullets in this caliber. Quite a bit of info on the Internet but, a lot of it is up to 15 years old. Looking for the newer powders info. Not that the old stuff is no good, just trying to get as much info as possible before I order the new barrel.

 

[AZShooter]

Here are some loads I have made with my 6-284s
(Fed 210 match primers in all loads. Necked 6.5-284 Lapua brass)
------------------------------------------------------

24" rechambered Rem takeoff formerly 243 1 in 9 1/4 twist:

95 gr berger classic hunter. Worked up to a very accurate load of 54 gr of RL-17 for vel of 3468 fps

----------------------------------

1 in 7.5 twist 30" 5R Bartlein

115 dtac bullets:

Retumbo: 55 gr yielded 3220 anything more opened up

H-1000: 51 grs was most accurate 3158 fps

RL-17:47 gr 3200 fps

DTAC never was that accurate moved on to the 107 Sierra matchking
--------------------------------------------------
107 Sierra MK seated .010" off lands:

H4831: worked from 49-51, 52 had some bold lift. 50 gr was most accurate 3125 fps

RL-17: 47 was max for 3250 fps

Retumbo: 57 most accurate 3265 fps

RL-22: 53 gr most accurate 3280 fps

------------------------------------------------------
Berger came out with their 105 Hybrid

installed a wyatts mag box so I could have a repeater. Bullets were seated with a .065" jump to rifling.

Retumbo: 58 gr for 3365 fps

--------------
Anomaly in barrel had to cut it off at 28 1/2" and recrown

105 Bergers continued:

Retumbo: 58 gr now yielded 3307 fps

------------------------------------------------

Switched to RL-33 Needed a drop tube even with that careful pouring was necessary. Your results may vary:

61 gr 3274 fps
62 gr 3335 fps
62.5 3376 fps
63 gr 3414 fps
63.5 3453 fps
64 3484 most accurate in this rifle
64.5 slight bolt lift




Killed a coues wt with this load two years ago distance 520 yds.

Barrel is showing signs of extreme wear. Over 1100 rounds. Shot 20 rounds with it last weekend. Continued to shoot without any cleaning and yesterday it began to throw bullets over 2" from POI at 100 yds. Borescope shows a horror show of cracking and crazing going over 20" up the barrel!Cleans up with much effort using boretech and Iosso. I think I am going to pull it and install my new 5R Bartlein 1 in 8 twist and chamber it for the 6 BR to shoot those wonderful 105 Berger hybrids.

In the future when I make another 6-284 I will stick with Rem 243 takeoffs and shoot lighter bullets for varminting. Those takeoffs are inexpensive. I do all work myself so it is no big deal to rebarrel.

I suggest you choose a bullet and stick with it. In future if I ever make another heavy 6-284 I would use either Retumbo or RL-33 AND NOT MESS AROUND WITH OTHER LOADS!!

 

[newmexkid]

Thank you very much for the info. I also tend to just find one load and stick with it. If I get 1100 rounds it would be great. That would mean the barrel would last me a long, long time.

 

[Jaxdialation]

Those Berger 105 loads are screaming fast!

I'll just take my 243AI and play elsewhere !

 

[waterfwlr]

Necked down 6.5-284 Lapua brass and Fed 210m primers. Ramshot Magnum I believe is the perfect powder for this cartridge. I've run the 105 gr Hybrids up to 3600 fps. That was a little too hot and not real accurate though. Settled on 58 gr of Ramshot at around 3450. That is where I read the accuracy node would be many times, and it also is with my rifle. Got around 500 rounds through mine now. Hybrids have consistently shot better than the SMK through this barrel. Shilen 8 twist.

 

[newmexkid]

Necked down 6.5-284 Lapua brass and Fed 210m primers. Ramshot Magnum I believe is the perfect powder for this cartridge. I've run the 105 gr Hybrids up to 3600 fps. That was a little too hot and not real accurate though. Settled on 58 gr of Ramshot at around 3450. That is where I read the accuracy node would be many times, and it also is with my rifle. Got around 500 rounds through mine now. Hybrids have consistently shot better than the SMK through this barrel. Shilen 8 twist.

Thank you. More to ruminate on!!

 

[Bart B]

Competitive shooters producing the best scores rebarrel their 6.5x.284's at 800 rounds. If you shoot as well as them with a 6x.284, you'll want to rebarrel at about 600 rounds.

Folks shooting the .243 in matches rebarreled at about 1500 rounds.