JASmith Wrote:Here's a summary with a few added --

Factory Resources:

http://alexanderarms.com/images/pdfs/grendel_reloading.pdf

http://data.hodgdon.com/cartridge_load.asp

http://www.ramshot.com/load-data/

http://www.accuratepowder.com/load-data/

http://www.vihtavuori-lapua.com/downloads.php

Hornady Manual

Sierra (per MidwayUSA -- needs confirmation)

Not Factory, additional resources:

http://ammoguide.com/?catid=456

http://www.reloadersnest.com/frontpage.asp?CaliberID=365

Questions -

Does anyone have the most recent Sierra manual and can they confirm that there's Grendel data in it?

Does anyone know of more factory reloading resources?

Flyby Wrote:The Nosler 2012 Reloading Guide #7 has 100 Grain and 120 Grain loads for the Grendel. It looks like their online version has added a 123 / 125 gr load also.

http://www.nosler.com/65-grendel

Quote:Primers affect the pressure generated by the cartridge. Changing from standard to magnum primers may substantially raise the maximum average pressure of the cartridge and indiscriminate changes are not recommended. The A-Square Company conducted pressure tests involving six different primers. These tests used the 7mm Remington Magnum cartridge with a 160 grain Sierra BT bullet and 66.0 grains of H4831 powder and the results were reported in the A-Square reloading manual Any Shot You Want. A-Square used CCI 200 and 250, Federal 215, Remington 9 1/2M, and Winchester WLRM and WLR primers in these tests. They revealed a total spread in pressure of 12,800 psi from the mildest standard (the CCI 200) to the hottest magnum (WLRM) primer tested.

Changing brands but using the same type of primer will also usually result in pressure changes, but ordinarily these will be less drastic. In the A-Square tests the pressure spread between the CCI 200 and the hottest standard primer (the WLR) was 9600 psi. The spread between the mildest magnum primer (the Rem. 9 1/2M) and the hottest magnum primer (WLRM) was 8300 psi. These are significant pressure variations that cannot safely be disregarded.

Incidentally, these same tests revealed that the Federal 215 and CCI 250 large rifle magnum primers produced nearly identical pressures. The difference between these two primers was only 100 psi. A-Square also reported that, while they had not tested these two primers in all possible cartridges, this result was typical of their experience with these two primers.

Basically, I follow the recommendations of whatever reloading manual I am using as a reference regarding the proper brand and type of primer to use. For example, if the load in the manual was developed using a WLR large rifle primer, then that is what I use. If one brand of primer (of the same type) must be substituted for another, the conventional wisdom is to reduce the recommended powder charge by 10% (assuming the load is not already at the minimum) and work back up slowly.

I don't know how valid it is, but the opinion of many reloaders seems to be that Winchester primers are generally the "hottest," Federal and CCI are the middle brands, and Remington primers are the mildest. That is also my impression, but understand that it is based on rumor and supposition, not fact.

When reloading, always seat primers slightly below flush with the head of the cartridge case. This insures that the anvil is properly pressed against the priming compound for reliable ignition. Failure to properly seat primers is the biggest single cause of misfires in reloaded ammunition. A good depth to aim for is .005" below flush. With some experience this can be determined by feeling the case head after the primer is seated. Any primer that is flush or protruding should be very carefully removed and the case reprimed. Decapping a live primer can set the thing off, so behave accordingly and take all necessary precautions, including ear and eye protection.

For hunting and general recreational shooting purposes I have not ordinarily seen a significant difference in accuracy attributable to using different brands of primers. However, there are exceptions to this general observation. Some loads do seem to work better with a certain primer. Sometimes the chronographed standard deviation in the velocity of a load is lower with one brand of primer than with another. In such cases I just go with the flow and use whatever primer works best.

ejkoechling Wrote:Speaking of reloading manuals. I can find the Volume 1 of the grendel reloading at AA, but I can't find Volume 2. Can somebody post a link please

SDguy Wrote:Suppose Barnes Load data may be of use to some. I see they indicate reloader 15 is a favored powder for the 100 grain TTSX. I do not have this powder on hand. Have been seeing some good reports on IMR 8208 with the TTSX as well. Anyone have experience with both powders. I will be giving the TTSX a go in the CZ 527 bolt Gun w a 24 1 in 9 barrel b4 long.

http://www.barnesbullets.com/files/2014/11/6.5GrendelBRM5V6.pdf

Madtown6.5 Wrote:Is that case trim length correct on Barnes load data? Case Trim: 1.150”

extremearchery01 Wrote:First off thanks for all the information everyone, getting started on reloading for 20" AWS and appreciated seeing some new links I hadn't found yet. I'm curious though I almost purchased the Accurate 2520 powder yesterday (settled for Win 748) and now that I read through Accurate's load data why is Alexander using 2520 at +30 gr while Accurate is saying 2230 at low to mid 20 gr. I guess why would Alexander be using a powder the manufacture isn't?

extremearchery01 Wrote:First off thanks for all the information everyone, getting started on reloading for 20" AWS and appreciated seeing some new links I hadn't found yet. I'm curious though I almost purchased the Accurate 2520 powder yesterday (settled for Win 748) and now that I read through Accurate's load data why is Alexander using 2520 at +30 gr while Accurate is saying 2230 at low to mid 20 gr. I guess why would Alexander be using a powder the manufacture isn't?