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  1. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    This may be the culprit. The fired headspace (using a Hornady headspace gauge) is 1.6300. The virgin headspace from the factory was about 1.640. So that's a pretty big gap to fill. However, I shot a mix of Virgin brass and some 1x and 2x fired - and even the 1-2x fire formed cases are...
  2. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I do not have a Chamber drawing. But it is a JP factory match barrel with matching headspaced bolt, so I would expect min dimensions. It does have a very tight neck. I have to neck turn Lapua brass to stay out of pressure. But the prime bass neck walls are significantly thinner, so the neck...
  3. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    So, after much thrashing trying to get a good load for my .260 Rem gasser, I finally arrived on one. I worked up (actually worked down - long story) a good load in Lapua brass using the Berger 130 AR Hybrid, 41.0 gr of IMR 4451 @2790 fps. Had no pressure signs with the Lapua brass and under .5...
  4. ReaperDriver

    Base to shoulder measurements virgin to 1x fired

    You just answered your own question re what’s going on. You’re shooting 5.56++ loads in a .223 tight match chamber. There’s your problem. I would ask any shooters on the line to step back when you”re going hot for their safety.
  5. ReaperDriver

    Base to shoulder measurements virgin to 1x fired

    Want talking about headspace. The free bore ans lead are the differences IF the OP is shooting 5.56 pressure stuff in a .223 cut chamber per the attached article.
  6. ReaperDriver

    Base to shoulder measurements virgin to 1x fired

    One thing just occurred to me..... is your chamber a .223, a Wylde or a 5.56 chamber? If it's a .223 only chamber and you're shooting factory 5.56 spec rounds or loading to 5.56 pressures - this could also be the root cause of your problems...
  7. ReaperDriver

    Base to shoulder measurements virgin to 1x fired

    Based on your case head expansion of .002, I would say it’s definitely over pressure. “Why” it’s over pressure still needs investigation. The headspace between virgin to fired seems pretty normal, so I don’t think that’s the issue. EDIT to add: Check your fired necks to see if they're good to...
  8. ReaperDriver

    Base to shoulder measurements virgin to 1x fired

    If you're worried about how hot the load is and if it's overpressue, I recently was told by a long time, very knowledgeable reloader that measuring the case head dimension (the solid part just above the extractor groove) and comparing it to the virgin. If pressure is excessive, then that solid...
  9. ReaperDriver

    Remington 700 tight chamber?

    To the OP, One other trick to try to see if your chamber is excessively tight is to check the neck thickness. I ran into this exact same thing recently with Lapua brass reloads as well as factory Nosler hunting loads in a .260 gas gun. I was getting pressure signs with fairly mild loads in a...
  10. ReaperDriver

    Pressure and Brass life in a gas gun

    For reference because someone will ask, the loads I'm running in both guns: 26" AI-AT bolt gun. 260 Rem 140 Berger Hybrid 42.8 gr of IMR 4451 Lapua Brass Fed 210 primers 2910 fps 144 Hybrid 41.5 gr IMR 4451 All same components as above 2830 fps 22" JP gasser .260 Rem / +2 (XXL)gas length 130...
  11. ReaperDriver

    Pressure and Brass life in a gas gun

    Hey all, need some help from the smart folks on something I'm seeing with brass life, loose primer pockets, etc. So quick back story and setting the scene. I have two 6.5 (.260Rem) rifles - one is an AI-AT with an aftermarket match barrel (Bartlein/Gradous reamed) and a JP barreled Gas-gun. I...
  12. ReaperDriver

    Neck tension-what's next?

    I’m doing exactly the opposite. I’ve got a box of .260 Lapua dedicated to the bolt gun and a different t on for the gas’s gun. That way I can keep the brass working better in each chamber without moving the dimensions around a lot. Plus it allows me to keep track of the brass life better for...
  13. ReaperDriver

    Reloading Equipment 130gr 6.5mm Berger Hybrid OTM Tactical bullets

    I'll take them. PM inbound.
  14. ReaperDriver

    Neck tension-what's next?

    In theory, no. It should make no difference. However, I did buy a Redding FL bushing die a while back to combine those two steps into one. I used it for a while with good results. However, I was comparing my FL+ bushing sized case's headspace to just the body die and there seemed to be more...
  15. ReaperDriver

    Neck Tension and Pressure Signs

    I know this is an older thread, so apologies if this has already been addressed..... but I ran into the exact same thing recently while doing load development for a .260 gas gun. I was getting pressure signs for no reason on what should have been light loads. Flattened primers, swipe, Ejector...
  16. ReaperDriver

    **6 Creedmoor**

    Nice rifle! What is it? An AXMC? How did your load do at 1000?
  17. ReaperDriver

    Neck tension-what's next?

    No. I have both the Redding body die+neck only Competition bushing die as well as a Redding FL Type-S bushing die. They do the exact same thing, just with either two steps or one step to achieve the same end result. ETA: Sorry, I see you are comparing Redding to a Forster FL die. Apples and...
  18. ReaperDriver

    6.5 CM Neck Tension Question

    Thin
  19. ReaperDriver

    Neck tension-what's next?

    I think what's often lost in these discussions is that every discipline is different and they have differing tolerances and risk levels. It's hard to compare what works best for F-Class is the best for PRS, much less Benchrest. PRS is going to reward consistency and reliability over a range of...
  20. ReaperDriver

    Stupid Question Saturday..... Bushing Neck sizing and Mandrel. Which one first and why?

    Ah, that makes a bit more sense. I hadn't taken spring back into account. I figured even if you used a smaller and smaller bushing, the expander mandrel would always set it to whatever it's diameter is and without different mandrel sizes, you were stuck with that fixed amount.
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