twists and nodes

[Hangfire]

I have read somewhere on another forum, that Team Hornady are using the .280 AI.

One would presume they would also be using their 162 grain HP Match bullets?

Anyone know if this is the case, and how do they run against other teams using 180 grain Bergers VLD’s/Hybrid?

Tim.

[Woody_rod]

The assumed improvement of the heavier projectile is merely an idea until it is shown on the target, and proven with ballistic testing etc. My own 260 improved running 123 grain Lapua Scenars at 3200fps will shoot inside any 7mm at 2800 fps. If the MV is not higher for the 7mm (close to 3000fp) there is very little advantage gained.

[DaveMc]

G'day Rod - I am a big fan of those 123's and agree they have great ballistics (I shoot them at over 3000 out of my 6.5*47 and pushed them up to 3400 out of the 6.5*284 with rel 17)

I agree that the 123 when pushed fast keeps up with the 139-142's at all but the longest distances

BUT -comparing to 7mm. What is that old card game call "CHALLENGE". (Now you are gonna have to prove it to me - hopefully we catch up before next years WA Queens to do so!! - will put a beer on it)

[AlanF]

The assumed improvement of the heavier projectile is merely an idea until it is shown on the target, and proven with ballistic testing etc. My own 260 improved running 123 grain Lapua Scenars at 3200fps will shoot inside any 7mm at 2800 fps. If the MV is not higher for the 7mm (close to 3000fp) there is very little advantage gained.

Rod,

According to my calculations, the 123gn 6.5mm Scenar has a G7 BC of 0.263. Using Berger Ballistics, a 7mm 180gn Hybrid (BC 0.345) at 2454fps will have the same wind-drift as your 3200fps Scenar at 1000 yd. Looking at it from another angle, if the 7mm Hybrid is launched at 2830 fps (a moderate and common load), your 123gn Scenar will need to exit the muzzle at 3520 fps for equal wind drift at 1000yd.

Alan

[DaveMc]

Hi guys, Rod did say "ANY" 7mm at 2800fps. I have some pointed Hybrids here. According to Litz this takes the Hybrid up by 8-9% (or .372-.376 G7). That will require closer to 3700 fps! - Now that is a challenge for the 260 INCH!
But now flying Rods Flag -he is stating this is all theory and we have to prove it at the range- so where do we meet?? Sydney? Mackay? Perth? or WA?
Bryan Litz has done a fair bit of real life testing on this bullet already. All these "theories" are actually based on many, many years of field data.
I use the tables in calculating my first elevation and wind shot for both projectiles and find I can get pretty close with both (sometimes some environmental factor will put them out - air density, wind direction etc. But in general they are OK. I have often used both my 6.5 and 7 on same day in same wind (even side by side with another shooter). I know these have the same wind zeros cause they were done at the same time on a beuatiful day and the windage wound on to my 6.5 is always more than the 7mm. When I was pushing em "real Hard" (3400) They would get "close" to a 175 7mm in wind but the vertical was all over the place. The 2800 7mm gets there with ease and "magical" vertical

Now open up the INCH to 7mm and you could be talking something really good.....Better still do it on a 284 case!!

I do agree with this though : a 162 AMAX pushed at possibly 3100+ (and I am sure Hornady will give them some quality bullets - hand selected?) will be a formidable weapon and they will be in the game.

Perhaps we will get to see the big 6.5 vs 7mm challenge at this next World champ's as team Lapua does not have a 7mm bullet. They have to use 6.5 x 284

[Cameron Mc]

Why not have a postal shoot. This can be club shoots, prize shoots etc over a period, then compare scores.
Say 700yds back to 1000yds.

Cameron

[DaveMc]

Great idea Cameron especiall where Rod shoots he is likely to encounter some serious wind and we rarely put on more than 2 minutes up here......

[Southcape]

Haha I like your way of thinking Dave.

Won't be here next year for the WA Queens. We will work on the dates for the other matches and see what we come up with.

[AlanF]

We had a 1000yd picnic shoot earlier in the month, 2 rounds of 10 shots. Top F-Std score was 91.1 (120.20 possible). Beat that!

[DaveMc]

Alan - That even puts Belmont to shame.

[LarryB]

Woody,
Bring your 260 imp/123 Lapua's to Raton, NM in September and we'll see how they fair.
Remember wind drift only counts if you can keep them in the middle (both left & right and up and down)
Merry Christmas everyone!

Larry Bartholome
Captain, Team BERGER

[AlanF]

Dave,

Belmont seems to have got a bit "attitude" about it the last year or two. Its the best range to stay at - but as far as shooting conditions go its apparently decided "no more Mr nice guy". I think its good for the sport to a have a few tough ranges - its tends to spread the luck around.

Alan

[AlanF]

Woody,
Bring your 260 imp/123 Lapua's to Raton, NM in September and we'll see how they fair.
Remember wind drift only counts if you can keep them in the middle (both left & right and up and down)
Merry Christmas everyone!

Larry Bartholome
Captain, Team BERGER

Larry,

Compliments of the season to you too.

Here was us planning to bring 7mm/30 cal rifles to the FCWC. Thanks to you, we now know that the BC is too high. Does the rest of the US team know that you're giving away their secrets?

Alan

[Southcape]

The 260 will be in Raton.

Merry Christmas to you and your team Larry.

Alan, you will find the teams are only to willing to share information with people. They figure if you beat them, using their own knowledge, then they need to try harder.
I love this way of thinking.

[AlanF]

I have to own up to a bit of tongue in cheek with my comment Linda. I doubt the US Team will be using anything less than 7mm.