270 Win Found My Recipe

meatyrem · 2024-11-13T19:55:04-0600

cajun said:
How many grains up or down were the other loads and how did they shoot? Reason I'm asking is Imr4350 is a great powder but velocities will change with temperature. I would shoot that good load in different conditions make sure it doesn't fall apart.

That's what I'm thinking. I recently went through the same theming the last couple days. Out of five different charge weights the one in the middle of the range was half inch and the rest were two to almost five inches. So one really good group makes me nervous about that load. My other one was very good throughout all the charge weights most were approximately 1/2" out of 7 different charge weights the two worst were about 1 1/2" spread. So my thoughts are it was very consistent through the ladder test unlike the one the other day where I only
Had one good group and rest were bad.

thomasbangs · 2024-11-13T20:30:37-0600

Wow, in over 50 years of reloading of more than a dozen different calibers, several different powders, several different weights of bullets, and different manufacturer of primers, I have never shot a 5 inch group at 100 yds with a rifle or at 25 yds with a handgun.

SecretSquirrel38 · 2024-11-13T21:57:04-0600

meatyrem said:
That's what I'm thinking. I recently went through the same theming the last couple days. Out of five different charge weights the one in the middle of the range was half inch and the rest were two to almost five inches. So one really good group makes me nervous about that load. My other one was very good throughout all the charge weights most were approximately 1/2" out of 7 different charge weights the two worst were about 1 1/2" spread. So my thoughts are it was very consistent through the ladder test unlike the one the other day where I only
Had one good group and rest were bad.

The max load is 55grs. I went down 1% from there for 10 steps down to 49.7grs I used excel to do my calculations and rounding. The lower I went the worse it got. IMR4350.

SecretSquirrel38 · 2024-11-13T21:59:41-0600

cajun said:
How many grains up or down were the other loads and how did they shoot? Reason I'm asking is Imr4350 is a great powder but velocities will change with temperature. I would shoot that good load in different conditions make sure it doesn't fall apart.

The max load is 55grs. I went down 1% from there for 10 steps down to 49.7grs I used excel to do my calculations and rounding. The lower I went the worse it got. IMR4350.

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SecretSquirrel38 · 2024-11-13T22:02:23-0600

Gobbler256 said:
What's your fps/velocity with this load?

I don't have a chronograph yet so I just go off the book. The gun does have a 24" barrel.

bowhunter123456789 · 2024-11-14T10:00:22-0600

So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

sjt18 · 2024-11-14T11:00:24-0600

bowhunter123456789 said:
So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

COAL/CBTO seem to be a much bigger deal than I thought. "Book" recommendations vary quite a bit too.

SecretSquirrel38 · 2024-11-14T11:25:05-0600

bowhunter123456789 said:
So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

COAL from the book is 3.340 and that is what I loaded to. I won't go above the book COAL when reloading any round. Factory rounds are typically below COAL.

sjt18 · 2024-11-14T12:54:59-0600

SecretSquirrel38 said:
COAL from the book is 3.340 and that is what I loaded to. I won't go above the book COAL when reloading any round. Factory rounds are typically below COAL.

My TGK is at 3.36- max for my magazine. Still about .020-.040 off the lands as best I can tell. It shoots pretty good.

I have 200 Norma Tipstrike bullets. Max COAL didn't work very well. I lost velocity and accuracy. After deer season, I'm going to start walking the length down to see if I can find accuracy and velocity. If not, I'll have to try a different powder. I'm using Hunter right now.

Norma factory ammo with that bullet seats REALLY deep. My last rounds were 3.320 about .020 off the lands.. Factory is about 3.170. I've found recommended COAL from 3.169 to 3.300

270 Win Found My Recipe

meatyrem

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