Shooting lead centrefire

[dromia]

So I was thinking slower and flater.

I know cast boolits are very versatile but don't see how that would work?

Low trajectory is a function of increased velocity not less velocity.

[meles meles]

Oh the rules of physics will change in a post Brexit world... Stephen Hawking and Quisling Cameron are in league on that one.

[legs748]

All will be shot at under 400m, one of my driving forces for this enterprise is the fact my G98 shoots 12" high at 100m. So I was thinking slower and flater.

Just a thought but can you get taller front sight blades/posts?, my '39 Mosin shot high at 100m so I fitted a taller front sight post which sorted it.

As its all original I don't want to even touch it with a screwdriver never mind a drift! I have had a look around there are plenty for enfields and some for k98 but not seen any original.

Dromia, slower and flatter works after being left in the pub a little longer than expected when trying to take in too much information at once! Slower and lower may be better.

[legs748]

The two key things for good shooting of cast is good bullet fit say 2 thou over groove diameter if you can seat out to the lands, if not then you will need a bullet diameter than will fit the freebore. Secondly the alloy must not be hard for up to 2000 fps I use range scrap softened with plumbers lead for a BHN of 10-12, for over 2000 fps I want tougher, but not hard, alloy. I use 0.3-0.5% copper added to my alloy for a BHN of around 16-18.


For your guns 2thou onto the groove diameters is the minimum size you want assuming that you can reach the lands, if not you will need to take a throat slug and get bullets to fit that.

Is this a case of chicken and egg? When choosing a bullet mould how can I work out if I can seat the bullet onto the lands without actually having the bullet?

[dromia]

No, you take an impact cast of the freebore/lead and compare those measurements to the bullet drawing.