25x47 vs 6.5x47 for NRL Hunter

[762 ULTRAMAGA]

As the title says I'm looking into getting a barrel chambered for NRL hunter matches, and I'm torn between the 6.5x47 Lapua or the 25 cal version.

Given the power factor requirements I'd have to send a 134 around 2840, or I could shoot a heavier 6.5 like a 144 lrht or 147 eldm in the low 2600s

I guess what I'm really hung up on is whether or not a lighter 25 cal bullet going 2850 offers any advantage in terms of recoil or ballistics over a slow high bc 6.5?

 

[codym]

I shoot a 25 creed for NRL hunter and I make power factor with both the 134 and 135 LRHT, not hard but not super easy. I would think you may have to run a longer barrel or step on the 47 case pretty hard to get 2840 out of it. Could be wrong just something to consider.

 

[hereinaz]

Get velocity for power factor and you are good. ^^^ that’s the info you need.

 

[Johnc427]

I also considered a 25x47 but from I researched it would be tough to make power factor unless it’s a 26”+. I shoot a 25 creed and 135LRHT in a 25” barrel at a very mild 2900. It hammers. And alpha brass is awesome

 

[762 ULTRAMAGA]

I also considered a 25x47 but from I researched it would be tough to make power factor unless it’s a 26”+. I shoot a 25 creed and 135LRHT in a 25” barrel at a very mild 2900. It hammers. And alpha brass is awesome

If you're coasting along at 2900 in a 25" creed it'd stand to reason that the 25x47 would easily reach 2840 with a 26" barrel at the same pressures.
How easy was the load development?

 

[wind gypsy]

Was just pondering specs for a 6.5x47 barrel for NRL with intention of shooting 144 LRHTs. I think the 25 cal would be cutting it too close on power factor for me. I am kind of stuck on the x47 because they just seem so trouble free and because I have a bunch of brass/dies already.