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Please help the "greenie"

 
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  #1  
Old 09-06-2007, 02:45 PM
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Please help the "greenie"

First off I would like to say hello to all and thanks in advance for weighing in on this topic. I am new to long range shooting and I am trying to gather as much info as possible before trying to thump any game. I have been looking around for info on my gun past 500yds. and its hard to find. I am shooting a M77 Mark II rem 280. My question is how far is my gun lethal given I can shoot it acuratly. The load I worked up that shoots best out of my gun is a Hornady 162 sst 56.5 grains of RL22 I conagraphed it at 2945 fps at the muzzle. I know this question is broad but any help is apriciated.
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Old 09-06-2007, 03:07 PM
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First of all, welcome to Long Range Hunting.

Take this for what it's worth, as energy is not the only deciding factor. A lot of people like to have 900-1000 ft. lbs. of energy at the maximum range they will shoot a game animal. That said, below is some data on your round that will show you how far the bullet will retain that amount of energy.


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Last edited by ss7mm; 09-06-2007 at 03:11 PM.
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Old 09-06-2007, 07:37 PM
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Welcome to LRH.

From what ss7mm posted I'd say that 850 would be about the max distance for deer and a closer for larger stuff.

There's lots of drop so I'd consider zeroing at 300 instead of 100, it'll give you less necessary adjustment or hold over depending on your scope's reticle.

Dick - what software did you use to get that chart. I've been using pointblank.exe and RSI.
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Old 09-06-2007, 10:29 PM
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Mark; ditto ss7 and royinidaho. If you don't anticipate shots over 500 yds, you're in clover. Otherwise, I would shut down at 600 yds because of trajectory and drift. (see my signature).

I'm a lot less picky on paper targets and in fact I used to shoot with a High Master who used a custom .280 Rem for his 600 and 1000yd Any Rifle. He won or placed in most matches he fired.

Try some 160 gr Accubonds.

Personally, I prefer the larger magnums because I'm a lousy wind doper.
Goes double for hunting. If you screw up on paper, no real harm done, but a lousy shot on game will ruin a trip, or the whole season.

Good luck, Tom
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Old 09-06-2007, 11:23 PM
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Quote:
Originally Posted by royinidaho View Post
Dick - what software did you use to get that chart. I've been using pointblank.exe and RSI.

Exbal........don't leave home without it.;)
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Old 09-06-2007, 11:44 PM
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MarkII280:

As long as you can range the distance accurately then trajectory becomes a small problem. It's the wind that will get you. Do whatever you can to eliminate as much drift as possible.

For something to think about......the wind drift for my 7mm AM at 1200 yards is about the same as your 280 at 850.

Sight in distance was mentioned and I'll just throw my $.02 worth in. I zero all my hunting guns at 300 yards. This gives me a point blank range of almost 400 yards before I have to worry about holding over or under very much. This is useful under somewhat hurried conditions. Zero at 100 and you'll be guessing or dialing at 400.
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Old 09-06-2007, 11:58 PM
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That is pretty fast load for a 280, I shoot a 7 mag with the same bullet. It isn't a hot load but I am only going about 100fps faster...very accurate! That matters more to me. I would keep that bullet to around 650yds at your velocities. The bullet might not open well any slower, so the ft lds of energy won't matter there.
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