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Rifles, Reloading, Optics, Equipment
Reloading
Hornady OAL Gauge
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<blockquote data-quote="hybridspecies" data-source="post: 2246719" data-attributes="member: 119219"><p>A couple other thoughts as I work through this, first, Berger 6.5 mm Creedmoor 140gr Hybrid Target Rifle Ammunition uses Lapua brass and their stated muzzle velocity of 2850 fps is very close to what I was getting with 41.8 grains of H4350 (2842 fps) using the exact same bullet and brass, so I'm leaning towards ruling out the brass and my charge as the source of overpressure (if any). COAL length of the Berger ammo is much less at 2.810" than I was using (2.9375") so seating depth is still a potential area of concern. Second, the Lapua brass has the Palma sized flashhole (0.059" vs the standard 0.080") and I'm wondering if that might be contributing to the primer flattening that I'm seeing? If anyone reading this has used this factory Berger ammo did you also notice primer flattening? Thanks.</p></blockquote><p></p>
[QUOTE="hybridspecies, post: 2246719, member: 119219"] A couple other thoughts as I work through this, first, Berger 6.5 mm Creedmoor 140gr Hybrid Target Rifle Ammunition uses Lapua brass and their stated muzzle velocity of 2850 fps is very close to what I was getting with 41.8 grains of H4350 (2842 fps) using the exact same bullet and brass, so I'm leaning towards ruling out the brass and my charge as the source of overpressure (if any). COAL length of the Berger ammo is much less at 2.810" than I was using (2.9375") so seating depth is still a potential area of concern. Second, the Lapua brass has the Palma sized flashhole (0.059" vs the standard 0.080") and I'm wondering if that might be contributing to the primer flattening that I'm seeing? If anyone reading this has used this factory Berger ammo did you also notice primer flattening? Thanks. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Hornady OAL Gauge
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