tryin 140 AMax in 6.5x47

[Eric Leonard]

Hello Mr. Big. There comes a time when what you want and what is attainable cannot be had.
If you want to reach higher velocity in the 6.5 x 47 you will have to open the case up, and I doubt even then!

Your best bet is a larger case designed to reach higher velocities without beating the case to death or blowing up your action. The velocities you have been getting in the 6.5 x 47L is directly in line with what the Lapua engineers designed the case for at HIGH pressures with the latest powder technology.

I don't mean the things I've said to be taken in a disrespectful way whatsoever.
The work you have done and reported has definitely backed up what everyone was actually wondering about the 6.5 x 47L in a factual and honest way.

no disrespect taken at all,,from some things I read I just thought I was missing something,,2750-2775 from 40 grs of powder and a bullet with a .618BC is a pretty good load and accurate,,but in the real world I seem to get better results with the 123 Scenar at 2980 and .530 BC,,

on paper it seems the higher BC bullet even at slower speed would do better at 1,000 and further but that is not what I am seeing,,and at closer than 500 the 123 is more precise by a lot than the 140,,

I wonder if the 123 Scenar and 140 Hybird are both closer to .550 BC than what they are advertised to be??

at any rate I am done with piddling around and just gonna load the 123 Scenar in the cold with 42.7 H4350 and in the heat with 39 RL15 and rock on,,

 

[Eric Leonard]

I am not sure how much pressure Lapua designed in the round but I thought I did read where they designed the round to compete against the 6BR at 300 yards with the 123 Scenar fast enough to be better in the wind and be as accurate as the 6BR,

it doesnt really matter to me as I dont shoot competition ,,all I want is the most accuracy I can get and stay supersonic as far as possible,,and in my rifle the 123 shoots better and the 140 isnt fast enough to make a big enough difference in the wind to be better than the 123,,IMO there is no shame in that,

if the 140 grouped better than the 123 in my rifle I would shoot it as the extra speed of the 123 isnt any better in the wind either,,with the speeds I am getting with both bullets they shoot very similar in the conditions,,the 123 just groups better for me,,

if I could get 2850-2900 with the 140 I could probably get 3100 with the 123s so I guess it is a wash,,

 

[Laurie]

I am not sure how much pressure Lapua designed in the round but I thought I did read where they designed the round to compete against the 6BR at 300 yards with the 123 Scenar fast enough to be better in the wind and be as accurate as the 6BR,

Correct! That was Lapua's objective with the cartridge for European ISSF 3-position 300-metre competition. ISSF is VERY big in many European and Scandinavian countries (not here in the UK) and Lapua was desperate to get the publicity that winners' photos and features about them using a cartridge with their name on it would bring.

It didn't work out as competitors stuck with the BR. Whether Lapua envisaged the cartridge's success in longer distance prone disciplines is an interesting question, but it's a good outcome whatever the original motivation. I suspect though that had they known how this cookie was going to crumble, they'd have made it with a slightly larger case capacity.

 

[Changeling]

Laurie that was very well said. I especially like your last sentence, LOL.

I could be wrong but I think Lapua designed the case (6.5x 47 L) for 62,000 or 62,500 psi

 

[Drop Port]

"Laurie that was very well said. I especially like your last sentence, LOL. "

Personally I'm glad they didn't, it is truly a short action cartridge. I will take the consistent accuracy over a few FPS every time. Just my .02 but for me there is nothing to improve on with a 140 hybrid and a short action.

Kind of reminds me of the 300 WSM when it first came out. It was marketed as cartridge for 150 class bullets. That didn't last long.

 

[ncwg2boatguy]

3-4 more grains of powders capacity and "Bam" The 6.5 Creedmoor never exist