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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Firing pin diameter for hunting application
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<blockquote data-quote="CBH Australia" data-source="post: 2089977" data-attributes="member: 116486"><p>the PTG bolt with a smaller firing pin should not have any effect on the load or pushing it a little more. It's a mechanical function the load is in the cartridge. </p><p>I did not realise they offer a small firing pin option in the bolt with a .30-06 bolt face.</p><p></p><p>From what I have read and been told is that some people but cases with a small rifle primer pocket in a case that would usually have a large rifle primer pocket from its original design because that's how it was.</p><p></p><p>Then I think .308 Palma brass was the first offering with a small rifle primer in a case that was designed with a large rifle primer pocket, because that was considered normal.</p><p></p><p>Palma match is some long range match originating using .308, I would only quote Google if o was to elaborate as I don't recall the details.</p><p></p><p>Now, you can buy .308Palma srp brass from Lapis, that's one off the shelf option. There are others and possibly other brands.</p><p></p><p>The reason they opt for a small rifle primer in the bigger cases that traditionally used LRP is said to be it gets more consistent charge in the powder column on firing. This improves consistency in the combustion leading to more consistency in velocity of individual shots.</p><p></p><p>i expect there is no advantage for the hunter to go to that degree or expense.</p><p></p><p>it seems others are advising the small diameter firing pin may cause unintended piercing of primers and that could result in hot gases escaping from the bolt area. On the range with glasses on that's bad at best, in the field it could be worse. </p><p></p><p>i have a few Tikka, they are very modular in most things are interchangeable and I'm thinking the .223 bolt face versions will use the same firing pin as the magnum calibres. </p><p></p><p>kerp it simple with the firing pin and stick with the large.</p><p></p><p>rereaf both of my posts or pm me if you want something cleared up. Of you are asking what I think you are the difference in firing pins may make difference for your purpose.</p><p></p><p>SOurcing special cases for this build if it's a hunting rifle is probably not necessary. I'll bet the 6.5-06 will be plenty fast enough with the right load.</p></blockquote><p></p>
[QUOTE="CBH Australia, post: 2089977, member: 116486"] the PTG bolt with a smaller firing pin should not have any effect on the load or pushing it a little more. It's a mechanical function the load is in the cartridge. I did not realise they offer a small firing pin option in the bolt with a .30-06 bolt face. From what I have read and been told is that some people but cases with a small rifle primer pocket in a case that would usually have a large rifle primer pocket from its original design because that's how it was. Then I think .308 Palma brass was the first offering with a small rifle primer in a case that was designed with a large rifle primer pocket, because that was considered normal. Palma match is some long range match originating using .308, I would only quote Google if o was to elaborate as I don't recall the details. Now, you can buy .308Palma srp brass from Lapis, that's one off the shelf option. There are others and possibly other brands. The reason they opt for a small rifle primer in the bigger cases that traditionally used LRP is said to be it gets more consistent charge in the powder column on firing. This improves consistency in the combustion leading to more consistency in velocity of individual shots. i expect there is no advantage for the hunter to go to that degree or expense. it seems others are advising the small diameter firing pin may cause unintended piercing of primers and that could result in hot gases escaping from the bolt area. On the range with glasses on that's bad at best, in the field it could be worse. i have a few Tikka, they are very modular in most things are interchangeable and I'm thinking the .223 bolt face versions will use the same firing pin as the magnum calibres. kerp it simple with the firing pin and stick with the large. rereaf both of my posts or pm me if you want something cleared up. Of you are asking what I think you are the difference in firing pins may make difference for your purpose. SOurcing special cases for this build if it's a hunting rifle is probably not necessary. I'll bet the 6.5-06 will be plenty fast enough with the right load. [/QUOTE]
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