https://systemz.online/reloading-methodology/reloading-programs-methodology AllGunStuff Discussion Board en-US Fri, 08 May 2026 00:08:28 +0000 wpForo 60 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7440 Thu, 15 Jan 2026 07:27:26 +0000 Reloading Methodology Againstthegrains https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7440 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7297 Wed, 17 Dec 2025 22:11:42 +0000 I have found thicker barrels shoot better.
I have found that most people have no idea how fast a thin barrel is affected by heat_(No even faster than that)
I have found that inaccurate lower velocity rifles (within reason) shoot better with the lower end of loads. .30 - .303 - 7mm 08
....................I have also that high velocity if problem rifles will sometimes come right at the very edge of stupid loads. .270 - 220 Swift -243]]> Reloading Methodology Treeman https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7297 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7295 Tue, 16 Dec 2025 11:06:44 +0000
I also find a lot of truth in that the most accurate loads are often close to max pressure. And by max pressure, this is specific for the rifle, not as per the reload manual.]]> Reloading Methodology Againstthegrains https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7295 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7283 Wed, 10 Dec 2025 03:18:39 +0000

What is your OCW method?

I do not shoot precision and LR shoots - the loads calculated by QL and GRT  have always served me good enough to practice and bring the venison home.


It's the one described by Dan Newberry .

I'm not a critic of GRT, it's a good modelling program, I find it very useful.

A well put together rifle with a sound barrel is going to shoot regardless, well enough for hunting purposes.

For example, this past weekend I resumed testing of my LR primer replacement in a BMG case, and at the same time, I had a batch of Lapua headstamp brass that I bought already primed. I'm using TZZ brass at the moment, and I could have deprimed the Lapua and re-primed the TZZ, but I have experienced misfires from primers that were removed and reseated in the past, so I decided to burn some powder with the Lapua brass and see what comes of it.

I had 4 different bullets, two different powders, and three different primers, with two types of brass. I used the same charge of powder type across the board, 220 grains of US869 and 225 grains 24N, irrespective of bullet weight or headstamp. Lapua brass is 10 grains less water capacity than TZZ.

My LR primer test was 8 rounds, the rest varied up to five, when a load gave me a less than completely smooth bolt lift, I stopped and moved onto the next one.

Other than the point of impact change per group, there was very little difference between them as far as group size goes, everything within 2 moa at 100 meters. Velocity variance between groups was around 2-300 fps.

The point being that if everything is right with the rifle and the scope, the ammo will perform to within that capability regardless.

This was not an OCW test, it was just an exercise to gather as much data as possible using the last of certain components and getting some practice at the same time.



]]> Reloading Methodology 414gates https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7283 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7277 Tue, 09 Dec 2025 23:35:16 +0000
What is your OCW method?

I do not shoot precision and LR shoots - the loads calculated by QL and GRT  have always served me good enough to practice and bring the venison home.]]> Reloading Methodology Ds J https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7277 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7269 Tue, 09 Dec 2025 08:36:31 +0000
I know that some people can get the computer to agree with what they shoot on target as far as calculated nodes go. I do question if another shooter behind the same rifle with the same ammo on a different day is going to get the same result.

I do not use GRT to tell me what a node is, I get the optimum charge for a given bullet, powder and seating depth from OCW testing.

In fact, my only use for GRT now is to determine when powder burn might be 100%, which if true will show up as low ES.

If you're not doing any OCW test, then three or five shot groups are not reliable indicators, you should increase that to 10 rounds.

]]> Reloading Methodology 414gates https://systemz.online/reloading-methodology/reloading-programs-methodology#post-7269 https://systemz.online/reloading-methodology/reloading-programs-methodology#post-938 Tue, 09 Dec 2025 01:30:34 +0000
We are developing loads and want to use GRT to calculate loads.

The very specific question is on calculating averages to feed into the program.

We did three 3-shot loads for a 6.5mm Grendel, and three 5-shot groups for a 308.

Do I calculate the average of every group, and use it to calculate a node for each group?

Or do I pick one group and calculate an accurate load from it?

Or do I work with OBT, and take whatever is closest to a node?]]> Reloading Methodology Ds J https://systemz.online/reloading-methodology/reloading-programs-methodology#post-938