OK, I have it now, and my numbers match yours. .268" of freebore it is. First of all, looking closer at both reamer prints the reference line IS marked at .22" from the bolt face. Take the distance marked from the reference line to the end of the neck and add .22" and I get 2.5398". And looking...
Yes you are right. I was making a mistake. The number I was reading on the reamer print was not to the bolt face, so it would NOT be the OAL of the cartridge. Good catch. It's to some datum line IN FRONT of the bolt face, on both reamer prints. The top of the belt, maybe? It does not say how far...
I measured the hole diameter of my two comparators when this first started out, since I was getting two different numbers. The holes apparently taper in a little inside the hole, so I measured as close to the edge of the hole as possible, about 1/16" in. My Sinclair comparator measures right at...
I agree! Like I said I would love it if someone did the math to confirm my numbers. That's part of the reason I provided all my info, including the COAL, which anyone should be able to match since it doesn't depend on a comparator. My Hornady comparator, by the way, gave an OAL of 2.93", so...
I'm shooting a Savage too. One option is to go with an aftermarket BDM bottom metal and mag system, such as the one offered by PT&G. I ran a thread on that about a month ago. That will get you 3.7" COAL. Figuring I have nothing to lose if I was switching bottom metal anyway, I did some "special...
You are right Rich. I've done some research now, and thought it would be a good idea to report back. I'm no gunsmith (and I welcome corrections, and/or if anyone can confirm my results) but I've looked over two different reamer prints and here's what I've come up with: the freebore for a 7mmRM...
Well, that's the problem right there. I would be asking the barrel manufacturer to throat it out for me. So given that I assume you would prefer to spend the extra for a (semi-)custom reamer? It occurs to me that I could then also specify a (slightly) longer neck to allow my brass to grow a bit...
That's pretty much what I had in mind. I have no interest in shooting lighter weight bullets out of this rifle so my thinking was to throat it for a specific bullet that will put me in the right range. I would still have enough neck to seat a shorter bullet (170-175g) another 1/8" out, or to...
Since my factory Savage 7RM barrel is toast, I'm looking to rebarrel it for the same cartridge but with a custom savage pre-fit barrel in 1-8 twist, and throated long to be able to load the Hornady ELD-M 180 grainers to full potential. I loaded up some dummy rounds: COAL at 3.670" and 2.810"...
I should add my experience with RL26 here.
My .260 rem is throated long, so I can seat 140 grain bullets with the boat tail right at the neck/shoulder junction, with a COAL just under 3". (Gotta love the long Savage SA magazines!) This allows me to get 49 grains of RL26 into the case (case is...
The new Leupold VX-6HD line has internal leveling (not a bubble, but the reticle flashes if you are not level). I haven't seen it myself, just read about it, so corrections are welcome if I don't have that right.
Sure thing. I appreciate your input and expertise. This has been a fun thought experiment, and I hope others on the forum benefit from it too. I still intend to run my own numbers, although mine are actually pretty close to yours. Slightly higher BC and MV (147 ELD-M at 3100 fps from a 6.5...
You beat me too it. This is exactly what I had in mind. As I read these numbers, (and correct me if I'm wrong) my windage would be dead on if I hold windage for a 600 yard flat shot. I wish I could say my hunting rifles shoot less than .36 MOA (less than 2.5" diameter group at 600 yards), but...
The idea of wind drift being based on time of flight (TOF) makes sense, as does the idea that TOF is not purely a factor of line-of-sight distance, and that to be *precise*, corrections will need to be calculated in.
A very interesting discussion! Thanks to those with amazing knowledge who...