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.260 Rem. Build
I went with 8.5 due to my extreme altitude (9000ft - 12000ft). I shoot the 139gr and 140gr rounds.- smorgousford
- Post #2
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
Yeah, I've recently stock up on a lot of 15+ round mags (even for guns that I don't currently have). It is great when it's 100* down in Denver and 75* at my house! Winter is unfortunate with that temp difference though...- smorgousford
- Post #61
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
Good points. I'm done doing chrono work on this load anyway now. It will shoot dead on from 0 to 600 yards by my ballistics program so that's all I was looking for in a hunting round. I hope to soon be able to do 0 to 1000 yards for the ballistics program for the Corbon Match 139gr Lapua round...- smorgousford
- Post #60
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
Wow, that is quite the difference. I will definitely plug in that new value and see how that works. I was actually able to take some chrono data for the Corbon Match 139gr Lapua load yesterday and got the following: Average: 2737 fps Std Dev: 7.12 Extreme Spread: 16 So all in all, it was...- smorgousford
- Post #54
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
Thanks! Glad to hear that you've taken some larger game down with a .260. Hopefully I'll blast one this fall...- smorgousford
- Post #53
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
Interesting. I didn't notice any pressure issues this time around but the extreme spread is worrisome. I'm looking forward to HSM's call back with what they think of the data I took. I actually have a lot of the 139gr Lapua loads for target shooting and am only planning on using the HSM 140gr...- smorgousford
- Post #52
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
So I was able to get out nice and early this morning to do a little target shooting and extended chrono work. My main goal was to make sure the HSM Berger 140gr VLD Hunting rounds were dialed in perfectly out to 600 yards. I'm planning at shooting at elk out to that distance this fall here in...- smorgousford
- Post #48
- Forum: Bolt Action Rifles
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Gradous....He actually does build rifles!!!
That is great! I'll have to remember that one in the future...- smorgousford
- Post #7
- Forum: Bolt Action Rifles
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.260 Remington Build by Southwest Precision - UPDATE: Load Development
I was out shooting today and chrono'd the HSM loads with 140gr Berger VLD Hunting bullets. They average exactly 2800 fps out of my 22" barrel so I'm happy with that! That means at my altitude (19.55 inHg absolute pressure), the bullet will be supersonic to 2300 yards.- smorgousford
- Post #46
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
I was able to get the Howitzer out to the range today for a zeroing/chronograph session. Here's the data I came up with: Load: PMC Bronze 660gr FMJ-BT Ave Velocity: 2610 fps Std Deviation: 11.25 fps Energy at the Muzzle: 10,003 ft-lbs Energy at One Mile: 2,829 ft-lbs Time of flight for...- smorgousford
- Post #27
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
Great story! If I ever draw a moose tag up here, this is the rifle that I'm seriously thinking about using. Ever see a moose do a backflip?- smorgousford
- Post #26
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
That is great! You nearly made a mount with your single shot. Did he take a step after being hit?- smorgousford
- Post #23
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
It is possible and is offered by some manufacturers (Safety Harbor actually offers one). I just had an extra lower around and it's a pain for me to get new firearms due to the distance to the nearest FFL from me. Also, a few extra ounces behind the balance point is fine with me. The balance...- smorgousford
- Post #19
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
According to the regulations that I see in my Colorado Big Game Guide (Official Colorado Parks and Wildlife Publication) there is only a minimum rifle limit (6mm, 16" barrel, 26" long, 1000lbft at 100 yards). So it looks like all the big game is possible with the big 50!- smorgousford
- Post #18
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
You're definitely right. I'm going to be shooting at rocks in that picture on the side of the mountains. I think the round should be carrying enough energy to make make a good dust puff. According to my calculations, the 750gr AMAX will be carrying around 4000 lbft of energy at one mile... I...- smorgousford
- Post #14
- Forum: Bolt Action Rifles
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577 tyrannosaur -- I am considering having one built
Go big or go home!- smorgousford
- Post #16
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
According to the manufacturer, Safety Harbor Firearms, they measured the following from one example of each barrel length on one day (so not a very large data sample): 18" Barrel: 2283.57 fps 22" Barrel: 2385.89 fps 29" Barrel: 2561.91 fps Average of 3 shots Temperature was 90+ F Humidity was...- smorgousford
- Post #12
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
I completely agree with the AR-15 lower looking weird on the 50. However, I wanted to keep the weight as low as possible and I already had a spare AR lower so this is what became of it. I used some paint and the Jimmy Plug to try to make it look a bit more acceptable. I have to hike in about 3/4...- smorgousford
- Post #10
- Forum: Bolt Action Rifles
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Mountain 50 BMG Rifle Build
- smorgousford
- Post #8
- Forum: Bolt Action Rifles
