6.5 prc brass discussion

bowhunter1287

Well-Known Member
Joined
Feb 3, 2015
Messages
238
I put titanium bolt handle with a tactical carbon fiber know on one and a little intermediate nob on the other they only weight 1.4 oz :) from Lumley arms
 

BrentM

Well-Known Member
Joined
Jan 10, 2013
Messages
3,127
Location
Meridian, Idaho
I put titanium bolt handle with a tactical carbon fiber know on one and a little intermediate nob on the other they only weight 1.4 oz :) from Lumley arms
That is the issue. I have had to fix a couple of these. The body that attaches to the bolt is not the same thickness as oem and increase the free space. PE is happening at the bottom of the ramp instead of the top so the brass is not being popped loose properly. The fix is to modify the ramp piece. It's hard to discuss on here but the idea is to shim that piece to take up the free space or go back to the oem handle. I have shimmed these and I have one on my bench I am drilling and tapping for set screws to take up the free space and go back to the ti handle.
 

BrentM

Well-Known Member
Joined
Jan 10, 2013
Messages
3,127
Location
Meridian, Idaho
Your brass measurements are strange. I suspect it is the calipers. .5275-.5285 is common for new brass. Fired brass will run .530 - .531. After sizing you need .5305 or less on a .5330 saami chamber. For example hornady brass tends to be totally fine with a standard die and sizes down to .530 after 6 firings still. Lapau and adg seem to be an issue and wind up at .531-.5315 after sizing. If running hot hot loads they size to .532 and there is all sorts of issues with extraction and bolt lift. If you have brass at .532 and only sizing to .531 you will likely have issues with bolt lift clicks.
 

jgs8163

Well-Known Member
LRH Team Member
Joined
Sep 27, 2011
Messages
1,925
Location
Southern Arizona
Brentm and jgs8163 where we left off
What is PE? On bolt
New brass .525
Fired brass .528
Fired re sized .526
Chamber .532
I did change bolt handles and put a lift kit in the bolts but was head spaced with all that installed
That is the issue. I have had to fix a couple of these. The body that attaches to the bolt is not the same thickness as oem and increase the free space. PE is happening at the bottom of the ramp instead of the top so the brass is not being popped loose properly. The fix is to modify the ramp piece. It's hard to discuss on here but the idea is to shim that piece to take up the free space or go back to the oem handle. I have shimmed these and I have one on my bench I am drilling and tapping for set screws to take up the free space and go back to the ti handle.
I removed mine and went back to the factory as well. I purchased a Savage factory Tactical handle that is beefier for sure. Allows for faster and more positive cycling. Don’t baby it when cycling it and get after it when cycling.
 

BrentM

Well-Known Member
Joined
Jan 10, 2013
Messages
3,127
Location
Meridian, Idaho
I removed mine and went back to the factory as well. I purchased a Savage factory Tactical handle that is beefier for sure. Allows for faster and more positive cycling. Don’t baby it when cycling it and get after it when cycling.
I will see if I can snap some photos and the fix for using those handles. I'll show the free space issue too. I've done a pile of savage builds. Lots of custom blue printing crap that caused issues with timing.
 

BrentM

Well-Known Member
Joined
Jan 10, 2013
Messages
3,127
Location
Meridian, Idaho
Also need to make sure you’re measuring the web in the proper area. I believe it’s at “200 line”. @BrentM correct me if I’m wrong.
That's basically correct. It's actually a bit further out but bottom line is that if the web anywhere above the main groove is getting past .532 on a fired case and not sizing less than .531 there is likely going to be an issue. The .200 line is basically the end of the solid brass and beginning of the case wall web. I've been happy with sizing down to .530-.5305 which shows to be about .0025-.003 room to expand. FPS and psi indicates this is acceptable. .5295-.530 is a little more tolerable to hot loads.
 

bowhunter1287

Well-Known Member
Joined
Feb 3, 2015
Messages
238
So there is 60” feeler gauges makes it tight then extracts fired brass that would stick factory handle extracts it just fine. And calipers are off had a cheaper set that measured it bigger at the .53 so I will look into a new set
 
Top