I'm curious what velocities people are finding their accuracy nodes at with 140gr bullets; and what charge weights people are using on the upper limits and where they're seeing pressure signs? Particularly with Lapua brass and H4350?
I've been loading for a 6.5cm for a couple years now, with some pretty good success but now I'm doing load development for a new custom 6.5cm I had built. I'm using Lapua brass and H4350, the same as I did on the first rifle but I've switched from 140gr Nosler BTs and HVLDs to Berger Elite Hunters. I'm working my way up through powder charges like always but I've noticed that, with this new rifle, my velocities are lower at a given charge than with my other Creedmoor. I'm up to 42.3gr and I'm only at 2692fps whereas my other rifle gives me 2827fps with 42.2gr. Now, this new barrel only has about 40 rounds down it; so maybe that's part of it. I'm about to load up another batch of loads to test and I'm trying to predict how high I can likely go. So, I'm curious where others found loads gave them pressure signs that stopped them. My other rifle has a node at 2825 that is really sweet - sub .5moa every group with only the barest of ejector marks, no sticky bolt, no primer loosening after 7 reloads and regular groups in the .3s when I'm doing my part. I was hoping to find a similar node with this rifle but, at this rate, I'd be looking at somewhere north of 43gr to get there. That seems high to me. Anyone else using this much H4350 in there loads? I guess I'm chicken poop. Lol!
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I've been loading for a 6.5cm for a couple years now, with some pretty good success but now I'm doing load development for a new custom 6.5cm I had built. I'm using Lapua brass and H4350, the same as I did on the first rifle but I've switched from 140gr Nosler BTs and HVLDs to Berger Elite Hunters. I'm working my way up through powder charges like always but I've noticed that, with this new rifle, my velocities are lower at a given charge than with my other Creedmoor. I'm up to 42.3gr and I'm only at 2692fps whereas my other rifle gives me 2827fps with 42.2gr. Now, this new barrel only has about 40 rounds down it; so maybe that's part of it. I'm about to load up another batch of loads to test and I'm trying to predict how high I can likely go. So, I'm curious where others found loads gave them pressure signs that stopped them. My other rifle has a node at 2825 that is really sweet - sub .5moa every group with only the barest of ejector marks, no sticky bolt, no primer loosening after 7 reloads and regular groups in the .3s when I'm doing my part. I was hoping to find a similar node with this rifle but, at this rate, I'd be looking at somewhere north of 43gr to get there. That seems high to me. Anyone else using this much H4350 in there loads? I guess I'm chicken poop. Lol!
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