7.62x51 load data question

[unicom]

Since every rifle is unique, bore, rifling, etc the rule of reloading has always been start low and work up. A caveat though. There are some loads that have a minimum charge as they have been known to explode. Research is your friend.

I agree that research is your friend. I’ve gone through 3 hardback reloading manuals and only one said anything about reducing the load by 10% I believe, don’t have the manual in front of me as I type this. Thus the reason a posted the question here as part of researching and asking for thoughts from all the reloaders on here. Thanks for all the responses.


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[Sam Colt]

10% is the rule of thumb to allow for thicker brass. To be accurate, measure your case volume.

 

[popper]

Measuring case volume is pretty silly. Seating depth is just as important because the fill ratio is what counts. With some powders, below min will give an incomplete ignition (dangerous), deeper seating creates higher pressure (higher fill). Deep seating can also cause a compressed load that some powders don't like! Load books give the OAL, and charge for a specific bullet. The Amax is a less expensive target bullet, does work OK for hunting but it may come apart on the target animal. I only load about 40gr in LC bras which give full fill as the base is below the shoulder. I also don't know how strong the base is, pressure may distort it above 55k psi. jacket isn't real thick.

 

[TEXAS "All or nothing"]

Measuring case volume is pretty silly. Seating depth is just as important because the fill ratio is what counts. With some powders, below min will give an incomplete ignition (dangerous), deeper seating creates higher pressure (higher fill). Deep seating can also cause a compressed load that some powders don't like! Load books give the OAL, and charge for a specific bullet. The Amax is a less expensive target bullet, does work OK for hunting but it may come apart on the target animal. I only load about 40gr in LC bras which give full fill as the base is below the shoulder. I also don't know how strong the base is, pressure may distort it above 55k psi. jacket isn't real thick.

OR, use 1 of your used cases drill the flash hole large enough too fill from the bottom after bullet has been seated. Use water and measure.

 

[avvidclif]

I agree that research is your friend. I’ve gone through 3 hardback reloading manuals and only one said anything about reducing the load by 10% I believe, don’t have the manual in front of me as I type this. Thus the reason a posted the question here as part of researching and asking for thoughts from all the reloaders on here. Thanks for all the responses.


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Most reloading manuals give a Min and Max load if exactly the same components are used. It may or may not be 10%. You find the 10% reduction mentioned in various manuals on reloading practices, not reloading data manuals.

 

[unicom]

Most reloading manuals give a Min and Max load if exactly the same components are used. It may or may not be 10%. You find the 10% reduction mentioned in various manuals on reloading practices, not reloading data manuals.

The 10% reduction came from a reloading manual. It was either Speer or Nosler. But it was a reloading manual


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[Deavis]

What do you use at 1k yds I'm getting into long distance

168s work fine for me. Most of the people in the long range rifle course I shot were shooting 168s as well and hitting well at 1000 yards when they judged the crosswind right.

 

[andre3k]

I haven't shot at 1k in a few years but I was using 175 SMKs out of a 28 inch barrel at 2690 fps I think brass was M118LR. Accuracy was decent, but nothing to write home about. Seems like the better shooters were all running Berger 185 Juggernauts and now the Berger 200-20x's. If I had to do it again go with Lapua small primer brass and 185 Juggernauts.

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