I know this topic has been somewhat covered before but I am looking for more specific information on how to neck down the 7-08. I am guessing that you would just run it through a 260 FL die with an expander ball then fire form from there? If not what dies/tools are needed to make precision loads from 7mm-08? Thanks, any help would be appreciated!
260 from 7mm-08
- Thread starter jcallan
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Re: 260 from 7mm-08
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jerry M</div><div class="ubbcode-body">Lube 7mm-08 brass, run into .260 die; remove lube; load.
Good luck
Jerry</div></div>
Exactly! A buddy just shot his new resized win 7-08 brass and the data off the chrono wasreally impressive. SD in single digits (as low as 2) for 4 of the 5 loads. Needless to say he was VERY happy converting from rem 260 to win 7-08 brass. YMMV of course.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jerry M</div><div class="ubbcode-body">Lube 7mm-08 brass, run into .260 die; remove lube; load.
Good luck
Jerry</div></div>
Exactly! A buddy just shot his new resized win 7-08 brass and the data off the chrono wasreally impressive. SD in single digits (as low as 2) for 4 of the 5 loads. Needless to say he was VERY happy converting from rem 260 to win 7-08 brass. YMMV of course.
Re: 260 from 7mm-08
Thanks for the help! I have always had great experiences with Winchester brass and wanted to keep using it.
Thanks for the help! I have always had great experiences with Winchester brass and wanted to keep using it.
Re: 260 from 7mm-08
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS?
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS?
Re: 260 from 7mm-08
What's really nice about Win 7-08 brass is how long it lasts, I have some with 15 firings, they have been annealed a couple times but still shoot good, I FL with Redding type S die with floating expander installed, and a .290 Ti bushing, after fire forming I ditch the expander.
What's really nice about Win 7-08 brass is how long it lasts, I have some with 15 firings, they have been annealed a couple times but still shoot good, I FL with Redding type S die with floating expander installed, and a .290 Ti bushing, after fire forming I ditch the expander.
Re: 260 from 7mm-08
Thanks 427Cobra! I think I seen a post from you in the past about this and was hoping you would comment.
Thanks 427Cobra! I think I seen a post from you in the past about this and was hoping you would comment.
Re: 260 from 7mm-08
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EddieNFL</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS? </div></div>
SD= Standard Deviation (dispersion from average) low numbers are good, generally below 10 is good for this game and is generally followed with extreme spreads of less then 20 fps.
SScott
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EddieNFL</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS? </div></div>
SD= Standard Deviation (dispersion from average) low numbers are good, generally below 10 is good for this game and is generally followed with extreme spreads of less then 20 fps.
SScott
Re: 260 from 7mm-08
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sunnyside Scott</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EddieNFL</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS? </div></div>
SD= Standard Deviation (dispersion from average) low numbers are good, generally below 10 is good for this game and is generally followed with extreme spreads of less then 20 fps.
SScott </div></div>
Yeah, learned the formula 30 some years ago. I misread the statement as four of five <span style="font-style: italic">rounds</span>. My bad.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sunnyside Scott</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EddieNFL</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SD in single digits (as low as 2) for 4 of the 5 loads.</div></div>
Not sure I follow. Do you mean he had spreads as low as 2FPS? </div></div>
SD= Standard Deviation (dispersion from average) low numbers are good, generally below 10 is good for this game and is generally followed with extreme spreads of less then 20 fps.
SScott </div></div>
Yeah, learned the formula 30 some years ago. I misread the statement as four of five <span style="font-style: italic">rounds</span>. My bad.
Re: 260 from 7mm-08
I start off with new 308 brass, neck it to 7/08 with no expander and then to 260 with no expander. Expand neck on separate operation and outside neck turn them to be about .001 to .002" smaller than chamber when loaded.
What kind of loads was he running to get those SDs?
I start off with new 308 brass, neck it to 7/08 with no expander and then to 260 with no expander. Expand neck on separate operation and outside neck turn them to be about .001 to .002" smaller than chamber when loaded.
What kind of loads was he running to get those SDs?
Re: 260 from 7mm-08
He was using a 130gr bullet with H4350. Sorry I don't recall the exact loads, but they were between 42.4 and 43.2. Found out that he had them jammed 5 thousandths and was having trouble cycling them. They were getting caught underneath the feed ramp. He has since seated them <span style="text-decoration: line-through">longer</span> <span style="font-weight: bold">shorter</span>, of course, but I haven't heard any chrono data back on this new seating depth.
He was using a 130gr bullet with H4350. Sorry I don't recall the exact loads, but they were between 42.4 and 43.2. Found out that he had them jammed 5 thousandths and was having trouble cycling them. They were getting caught underneath the feed ramp. He has since seated them <span style="text-decoration: line-through">longer</span> <span style="font-weight: bold">shorter</span>, of course, but I haven't heard any chrono data back on this new seating depth.
Re: 260 from 7mm-08
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rosie Palma</div><div class="ubbcode-body">He was using a 130gr bullet with H4350. Sorry I don't recall the exact loads, but they were between 42.4 and 43.2. Found out that he had them jammed 5 thousandths and was having trouble cycling them. They were getting caught underneath the feed ramp. He has since seated them longer, of course, but I haven't heard any chrono data back on this new seating depth. </div></div>
I seated them shorter nuckle head, 10 off the lands.
7-08 virgin brass
CCI primer
43.1 H4350
Fps 2869
Es 15
SD 6
So not as good as jamming them in where every load I tried had a SD of 4 or less.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rosie Palma</div><div class="ubbcode-body">He was using a 130gr bullet with H4350. Sorry I don't recall the exact loads, but they were between 42.4 and 43.2. Found out that he had them jammed 5 thousandths and was having trouble cycling them. They were getting caught underneath the feed ramp. He has since seated them longer, of course, but I haven't heard any chrono data back on this new seating depth. </div></div>
I seated them shorter nuckle head, 10 off the lands.
7-08 virgin brass
CCI primer
43.1 H4350
Fps 2869
Es 15
SD 6
So not as good as jamming them in where every load I tried had a SD of 4 or less.
Re: 260 from 7mm-08
because an SD of 6 is so much worse than one of four......
I'm thinking of trying those 130 Norma's for my Creedmoor.
Quickload has them listed with a BC of .61!!!!!
I would like to see them shoot a little tighter, esp with you pulling the trigger, but as we discussed there are other variable on your rig that may be liable for that.
because an SD of 6 is so much worse than one of four......
I'm thinking of trying those 130 Norma's for my Creedmoor.
Quickload has them listed with a BC of .61!!!!!
I would like to see them shoot a little tighter, esp with you pulling the trigger, but as we discussed there are other variable on your rig that may be liable for that.
