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Hunting
Long Range Hunting & Shooting
30 Nosler & 300 PRC vs 30-28 Nosler & 300 PRC SI Wildcats
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<blockquote data-quote="BoatTail" data-source="post: 1564319" data-attributes="member: 74670"><p>I wanted to talk about throat diameters today and would like your input. Few years ago I started working with a gunsmith in Colorado Springs Colorado. He's done all my builds for the last 3 rifles. For my reamers I'd always worked with Dave Kiff on the designs and expert for the chamber dimensions. My gunsmith always talked about using his reamers because they had a parallel throat that would better align the bullet as it entered the rifling. He said with his reamer designs bullet seating depth were less important. I had a hard time with that because I didn't understand and it always held my CAOLs 15 to 20 thousands off the lands with good success. I finally understood it this year that what he was talking about was the throat diameter from where the case mouth ends, to where taper to the rifling starts. This I realized was a parallel section . Most of the match chambers I've seen and built to have a throat diameter of the caliber plus 0.0005. So for 0.308 caliber match chamber, the parallel throat diameter would be 0.3085. However, on the 300 PRC they use 0.3088. I was wondering why they went with the larger throat when it's touted to be a match chamber. I assume they did it to avoid liabilities and the difference between 0.3088 is not much from the 0.3085. Your thoughts?</p></blockquote><p></p>
[QUOTE="BoatTail, post: 1564319, member: 74670"] I wanted to talk about throat diameters today and would like your input. Few years ago I started working with a gunsmith in Colorado Springs Colorado. He's done all my builds for the last 3 rifles. For my reamers I'd always worked with Dave Kiff on the designs and expert for the chamber dimensions. My gunsmith always talked about using his reamers because they had a parallel throat that would better align the bullet as it entered the rifling. He said with his reamer designs bullet seating depth were less important. I had a hard time with that because I didn't understand and it always held my CAOLs 15 to 20 thousands off the lands with good success. I finally understood it this year that what he was talking about was the throat diameter from where the case mouth ends, to where taper to the rifling starts. This I realized was a parallel section . Most of the match chambers I've seen and built to have a throat diameter of the caliber plus 0.0005. So for 0.308 caliber match chamber, the parallel throat diameter would be 0.3085. However, on the 300 PRC they use 0.3088. I was wondering why they went with the larger throat when it's touted to be a match chamber. I assume they did it to avoid liabilities and the difference between 0.3088 is not much from the 0.3085. Your thoughts? [/QUOTE]
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30 Nosler & 300 PRC vs 30-28 Nosler & 300 PRC SI Wildcats
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