Tilb004 wrote:Lapua , once fired .
Normal prep , brush necks , clean primer pockets , FL size .
Brass is trimmed to within spec .
Np. I asked as I remembered reading the following from Stuart at BRT:
"Stuart’s Tips: fair warning.
We are disappointed to have to say this, but if you will be using Hornady brass for either 6mm or 6.5 Creedmoor with any good seating dies like these Forster dies and then expect that an internal neck expander resizing system will help overcome the irregular effects of this brass, you will be disappointed and frustrated for sure. We can’t stress this enough. We feel forced to mention this because we have had to deal with some many reloading problems and complaints about many tools and dies. After buying lots of nice dies and other nice tools like these Forster seaters (or LE Wilson seaters) and get poor results. It’s all because of poor brass. The brass might look good externally but it has very high springback and is particularly tight down in the shoulder/neck junction area. No expander will correct it. It does vary but mostly just springs back to where it was before and the reloaders don’t figure out this out. It is difficult to measure and observe this situation and people reloading seem to just assume an expander type situation will correct it all. But no, bullet seating will be irregular and inconsistent and worse with some bullets (particularly if also using Hornady ELD type bullets). Often will show compression rings where the seater stem contacts (and slips) if bullets are seated deep for sure. There are many other things too which can impact bullet seating tension and pressure, like proper inside case lube. But our advise is this, if you wish to do a some precision reloading and precision shooting…BUY GOOD BRASS. That is is our recommendation from lots of experience. Please don’t blame the tools being used. When diagnosing issues like this, look closely at the components being used first.
Also one tool to assist you in this regard to gain a feel of brass internal size and all the way down the neck would be the Forster inside neck tension gauges. A very helpful tool
https://www.brtshooterssupply.com.au/pr ... ion-gauge/"
1F Lapua *should* not be an issue, but failing all else I would gauge them, a lot, and perhaps try an anneal, but it's a thin straw to be grasping.
Assuming the die is the correct one for the cartridge; clean, properly lubed and set up such that normal function should be expected, about the only other thing that comes to mind at the moment is to use some engineers blue to check the actual seating stem/projectile contact patch. Imho not even one of them thar new-fangled skinny bullets with the plastic nipples would get far enough into a Forster seating stem to bump the tip, but ruling it out is a forward step.
gl with it, and please be sure to share the solution once discovered.
It's hard for me to act my age, I've never been this old before.