Re: Just in time for Christmas: Tac Ops Kilo-51
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body">That works... design the chamber around the dies... but with a Tac Ops, one of the main reasons to go with Tac Ops is that they are designed around FGMM... so you are "stuck" with the reamer that Mike uses.</div></div>
Yes, well in that case you're always using the same chamber reamer specs, so it amounts to the same. There will be some variation anyway. Plus, chambers tend to get larger the more they are fired.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body">
FWIW, I neck turn and cut a bit into the shoulder to avoid donuts. Isn't not sizing the last 1/16" just putting off the donut? In other words, it is still there, it is just not being pushed in until it gets to 1/16" from the shoulder? </div></div>
It really depends on your chamber's neck dimensions and the thickness of the brass where the donut occurs. As long as the donut isn't interfering with the pressure ring on the bullet or squeezing it, I find it doesn't really hurt anything. I haven't had any donuts creep up that far yet before my cases died for other reasons, but it would depend on a lot of factors (caliber, <span style="text-decoration: line-through">neck</span> shoulder angle, brass hardness, pressure, etc...), so yes, it could.
One of the best simple tests you can do is take a fired case and stick a bullet in it. It should slide freely in the neck. If it doesn't, you either have a donut or a burr around the case mouth (outside, inside or both), which can act like a donut. If either area is really tight, some fairly larger pressure spikes will occur.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body">That works... design the chamber around the dies... but with a Tac Ops, one of the main reasons to go with Tac Ops is that they are designed around FGMM... so you are "stuck" with the reamer that Mike uses.</div></div>
Yes, well in that case you're always using the same chamber reamer specs, so it amounts to the same. There will be some variation anyway. Plus, chambers tend to get larger the more they are fired.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body">
FWIW, I neck turn and cut a bit into the shoulder to avoid donuts. Isn't not sizing the last 1/16" just putting off the donut? In other words, it is still there, it is just not being pushed in until it gets to 1/16" from the shoulder? </div></div>
It really depends on your chamber's neck dimensions and the thickness of the brass where the donut occurs. As long as the donut isn't interfering with the pressure ring on the bullet or squeezing it, I find it doesn't really hurt anything. I haven't had any donuts creep up that far yet before my cases died for other reasons, but it would depend on a lot of factors (caliber, <span style="text-decoration: line-through">neck</span> shoulder angle, brass hardness, pressure, etc...), so yes, it could.
One of the best simple tests you can do is take a fired case and stick a bullet in it. It should slide freely in the neck. If it doesn't, you either have a donut or a burr around the case mouth (outside, inside or both), which can act like a donut. If either area is really tight, some fairly larger pressure spikes will occur.
