Home Forums Hunting & Shooting Long Range Hunting Lapua Scenars 155 .308 differences?

I haven't wasted any money on the ELD-X. (plastic tips on all other bullets melt in flight - gimme a break)

In my custom M700 .264 Win Mag (1:9) any my Tikka T3 .260 (1:8) the 140 A-Max simply couldn't hang with the 139 Scenar in the accuracy dep't.

Well yea....the tips are melting....grin

Tip degradation is a fact. It isn't saying that the tip "melts" and there is nothing left, it's saying the the tip is slightly reduced and affecting potential BC.





DELGUE,

The ELD-X is a very different performing bullet than Scenars. In general Scenars will produce a narrower yet slightly deeper wound channel. ELD-X will produce a wider yet slightly shallower wound channel.

I updated my copy of Oehler's Ballistic Explorer last week and discovered it now includes Lapua custom drag functions, which were developed using Doppler radar. Lapua also publishes a G7 BC of 0.230 for their 0.308 155g Scenar. Another new tool in Ballistic Explorer is the drag analyzer.



The custom drag function is in green with G7 in red. The two plots match up well between 2600 and 1600 fps, but outside that range G7 shows more drag. Still, even with a muzzle velocity of 3200 fps there's only 4 inches difference in drop at 1000 yards.

There's over 50 custom drag functions, and I've only played around a bit, but found that some bullets don't match well with either G1 or G7, at least not at long range.

OK, so I traded for 250 of the .308 155 scenars from another member. I am seeing the same thing as the OP - some of them have a smaller opening.

More interesting, the smaller opening tipped bullets have a different COAL when loaded with the same seating die as compared to the larger opening ones:

Larger opening: 2.790"
Smaller opening: 2.815"

Anyone else see this problem?

Next step is to test them...

Kimber7,
It's been my experience these 155 Scenars are very forgiving and non-picky with seating depth variances.