GAP 338LM - When load development starts to pay off

[cactusbrew]

I received my GAP 338LM build around christmas and think i have finally worked up a load that will make me smile all day long.

The rifle is a templar action, Badger M5 CIP, 28 inch MTU 9.5 twist Bartlein barrel with Badger brake, sitting in a MCM A5 with KMW adjustable check. I have an SB PMII 5x25 MSR scope in Badger rings.

Over the last few months I have been working up loads with H1000 and retumbo and shooting 300 grain Scenars or 300 grain Berger OTMs. I was getting 1/2 MOA with the Scenars and was hopeful the Bergers could serve me better. I was finally able to find some Bergers last month and began my quest for the perfect load.

I shot the below group at 300 yds this morning with the following recipe:

Lapua brass, Fed215m primer, 93.5 grains of retumbo, Berger 300 grain OTM pills, sitting .01 off the lands.

 

[DPMSLR308]

Looks to be a very nice set up!

 

[okeefe]

Impressive rifle and group. Congrats

 

[Layton]

Very nice. Do you know what velocity you're getting?

L

 

[Boltfluter]

Now that is a group to be proud of. Great shooting and a very nice looking rifle.

Regards,
Paul

 

[cactusbrew]

Very nice. Do you know what velocity you're getting?

L

When I was shooting 300 grain scenars with this load I was getting 2805/2810. I will chrono the above load tomorrow morning and will be real happy if I am at least at 2800.

 

[Layton]

Thanks. I'm curious as I run almost the exact same setup you do. I'm getting 2780 with 93.5g and Berger 300s. Single digit consistency at this point. What's your COAL?

 

[cactusbrew]

The velocity stated above is with the scenars, i will be chronoing the bergers tomorrow.

I was .01 off the lands but cannot remember the exact COAL, i will check tonight when i get home. If the weather is decent tomorrow, i will have the numbers for the bergers tomorrow afternoon.

 

[Gray]

http://www.snipershide.com/shooting/showthread.php?t=97101

^^^^^^^^^^^^^^^ This!!

 

[cactusbrew]

http://www.snipershide.com/shooting/showthread.php?t=97101

^^^^^^^^^^^^^^^ This!!

Oh yeah!

This was the exact thread that made me realize i had to have a GAP338. If i can ever find powder again, ill also work up a load with H1000 and see what she will do.

GAP --- as usual, making it easy.

 

[cactusbrew]

Thanks. I'm curious as I run almost the exact same setup you do. I'm getting 2780 with 93.5g and Berger 300s. Single digit consistency at this point. What's your COAL?

The COAL is 3.048 on the ogive (not including the comparator guage).

 

[Layton]

So you're .14" further out than I am. I'm running TRG42 mags and that's as long as I can go and mag feed. (edt: Actually I'm touching at mag length so I back off .013") Thanks! Oh, and did you get any numbers off the Bergers?

L