600 Yard. 155 v. 168 Grain Bullet

[musketjon]

Ok,
I just registered for the upcoming 3x600 at the end of the month. Never shot 600 yards before for score. Hell, I'm not even sure I can see 600 yards but I'm gonna' give it the old college try anyway.
Here's my question: I have a proven rifle (M1) and load for 200 yards using H4895 and Amax 155 grain bullets. Will the 155's be ok at 600 yards or should I use 168 grainers? I have a slew of both and the LGS is out of the 174's.
BTW, it's 30-06 caliber but I assumed you already figured that one out.
Thanks
Jon

[timshufflin]

Watching and waiting.

[canes7]

155's will get you done. The difference between 155's and 168's @ 600 won't even be a scoring ring in my estimation. Remember the Palma team uses 155's out to 1k. Hold hard and don't rush your shots. Wait out your conditions too. Before you get to the line figure out what the prevailing condition is, shoot in that condition only. When it changes wait for it to come back, if it doesn't return in a minute or two make a sight adjustment and write it down so you can go back to original settings when the prevailing condition returns. If the wind is steady from one direction, for example left to right, and gusts every now and then you'll want to sight in on the left side of the 10 ring, so if you break a shot during a unanticipated gust it'll blow you into the X or at worst the right side of the 10.

Remember, the aiming black on a 600 yard target goes all the way out to the 7 ring. That's done intentionally so that the aiming black looks the same form 200 all the way back. Your sight picture wont change.

Hope this helps... and enjoy. You'll have a ton of fun.

[musketjon]

Good info. Thank you, Sir.
Jon

[canes7]

So, how'd you do?

[musketjon]

It's next Saturday.
Jon

[Phil McGrath]

Remember the Palma team uses 155's out to 1k.

Hope this helps... and enjoy. You'll have a ton of fun.

Well that's not a very good example Palma rifles also use a 30in tube and drive the bullet as close too 3000fps as they can get, that's a pretty extreme loading in either .308 or 30.06 in a M1.

I can't help with any 155 load data in 30.06, but 46.5 of IMR/H-4895 under a 168 works well, I like 3.30 COAL. Same load with Varget is also a X-ring killer if you can read the wind and hold hard.

[canes7]

Well that's not a very good example Palma rifles also use a 30in tube and drive the bullet as close too 3000fps as they can get, that's a pretty extreme loading in either .308 or 30.06 in a M1.

I can't help with any 155 load data in 30.06, but 46.5 of IMR/H-4895 under a 168 works well, I like 3.30 COAL. Same load with Varget is also a X-ring killer if you can read the wind and hold hard.

I also bet Jon doesnt shoot for the Palma team! I'm just trying to offer word of encouragement and remove perceived obstacles. So much for that.

[musketjon]

I loaded up 100 rounds last night on the advice of someone who has shot this course on this range before. Amax 168, IMR4895, 46.0 grains, Winchester brass and WLR primers. I'll keep you all posted.
Jon

[canes7]

You'll do just fine. It'll be fun.