What was your speed @ 75.6?
Pressure signs way below max load
- Thread starter Mc Fraser
- Start date
Help Support Long Range Hunting Forum
michael carlucci
Active Member
i once had a 7mmmag that blew primers with factory loads why.i dont know it was brand new a savage model 110.i have had trouble more than once with savage firearms.i could never load max loads in either one of those rifles.i can only conclude that they were made with minimal chamber dimentions.reamers wear if you have a rifle made with a used reamer thats what can happen.i eventually sold both guns.i never had the same problem with remingtons or at least rem model 700s.i had a rem model 600 that was a dog in 308 short bbl lousey trigger innacurate they no longer make that firearm model.
Will have to look back at my notes brother but around 2870 or so and the SD was like 1. It's my hunting load. That is a short barreled 300, I am running 22" proof with a tbac ultra 9
lyle2231
Well-Known Member
Respectfully, Give the powder manufacturing company a call this week with lot numbers/powder/load and bullet. See what they say. I'd be interested in their reply.
Best!
Best!
Ronald W Schaefer
Well-Known Member
You might try some of the Alliant RL series powders, RL 22, 23, 25, 26...my experience is higher velocities at lower loading densities. From Alliant Manual:
24" test barrel, Fed 215 prim, 215 Berger Hybrid, OAL 3.34
71 gr RL-22 = 2875
68.5 gr RL-23 = 2784
75 gr RL 25 = 2937; 200 gr Hndy ELD-X
74 gr RL-26 = 2973
With a 26 in Barrel, any of these should get you pretty good velocity...
24" test barrel, Fed 215 prim, 215 Berger Hybrid, OAL 3.34
71 gr RL-22 = 2875
68.5 gr RL-23 = 2784
75 gr RL 25 = 2937; 200 gr Hndy ELD-X
74 gr RL-26 = 2973
With a 26 in Barrel, any of these should get you pretty good velocity...
Ronald W Schaefer
Well-Known Member
A final thought, even though the chart shows you can run higher it seems that load is just too hot and your seating depth may be too deep. IMO, once you're over 2900+ in .300 Win, especially with that 200gr bullet you are there man...I' call it a day velocity wise and start working on precision. For comparison, I have a beautiful old German .300 Wby Mag I run 180 gr Barnes TTSX, 79 gr of old tried and true I-4831(I recently tried all newfangled stuff just for grins and went back to 40 y/o load
. I clock 3208. That's a 26" pipe, bigger case and lighter bullet. Kudu and Eland harvested this May in S Africa did not notice old school load or lighter bullet.
. I clock 3208. That's a 26" pipe, bigger case and lighter bullet. Kudu and Eland harvested this May in S Africa did not notice old school load or lighter bullet.I didn't read the whole thread, but I got bit years ago loading some older CIL brass. The new internal case volume was different than regular loads. I've also seen an article where a smart fella did a case volume test with water measurements...Rem vs. Win vs. Hornady etc. The difference we're shocking. Don't know if this helps but the answer is out there, keep asking.
Rudolph Ferdinand
Well-Known Member
What is this carbon ring that you mention? I've been handloading since 1990 and I have never heard of a carbon ring. I am just getting back into reloading the precision side of it, I took up archery but I continued to do some reloading more like a little for hunts out of state.
Rudolph Ferdinand
Well-Known Member
I've been away from reloading I took up archery but I did continue to do some reloading for hunts out of state. What is CBTO?
Cartridge Base To Ogive. Here are good articles on COAL and CBTO >>>
https://bergerbullets.com/vld-making-shoot/
https://bergerbullets.com/wp-content/uploads/2013/03/COAL.pdf
Last edited:
Maybe I'm missing something here but at 3100 fps for a 300 win mag, regardless of you barrel, is way too fast. I also dont understand the statement that your "under Max load" 3100 fps for a Berger 210 is way too fast. More like in the 2800 +/- area, right from the Berger book1st. Addition. Maybe I need a newer book?
jfolanddvm
Well-Known Member
I am not an expert as are many on here, but I love shooting and have been reloading a fair bit over the last 15 years. I may be missing something, but I believe there is s reason that every reloading manual lists minimum and maximum charge weights. I have a couple of rifles that showed signs of pressure below the max charge - I just assumed it was that particular rifle's configuration/chamber/throat shape. I may just be too timid, but I always start working up loads by starting at the minimal charge weight and increasing by a half grain until I see mild pressure signs. If that's under max, well ok. Why not just seat your bullet .020 off the lands (or at max magazine length if it's a hunting round) and start back down at the minimal charge weights and go up till you see pressure signs? If you still see pressure signs below the max charge, but can get good accuracy and velocity, I would consider it a positive that you will save a few dollars in powder over the life of the rifle. Like I said, I am far from an expert, but am a huge fan of this forum and an even bigger fan of the philosophy of "KISS"! The last S on there is aimed at me - not anyone on here.
Mc Fraser
Well-Known Member
Decided to load a few rounds last night and went to the range this morning. Here are the oictures, I'll post the details in a minute.
Mc Fraser
Well-Known Member
I don't know why so many pictures, supposed to be only 4 from 2 cases from different angles.
I tried 3 rounds:
1. 200gr ELD-X, 69.5gr IMR 7828SSC, COAL 3.340in 2964 fps.
Hornady book says min 65.4gr and max 73.9gr @ 2850fps. I am 4.4gr under.
2. 212gr ELD-X, 73.0gr H1000, COAL 3.500in 2939 fps.
Hornady says min 65.3gr and max 77.6 @ 2800fps gr. I am 4.6gr under.
3. 210gr VLD Hunting, 77.0gr, CBTO 2.7300in 3032fps. There is no official load data for N570 and 210gr VLD Hunting.
These loads were done by a friend of mine with his method, he is a competition shooter.
I am confused, I thought the more powder you add the more pressure you will have ... seems to me that the amount of powder is irrelevant as long as the velocities are low.
I always thought it is unsafe to start with min loads in magnum rifles, but I will try the min load for ELD-X bullets.
Assuming human error is not an option here, is there anything that can be wrong with the rifle itself?
I tried 3 rounds:
1. 200gr ELD-X, 69.5gr IMR 7828SSC, COAL 3.340in 2964 fps.
Hornady book says min 65.4gr and max 73.9gr @ 2850fps. I am 4.4gr under.
2. 212gr ELD-X, 73.0gr H1000, COAL 3.500in 2939 fps.
Hornady says min 65.3gr and max 77.6 @ 2800fps gr. I am 4.6gr under.
3. 210gr VLD Hunting, 77.0gr, CBTO 2.7300in 3032fps. There is no official load data for N570 and 210gr VLD Hunting.
These loads were done by a friend of mine with his method, he is a competition shooter.
I am confused, I thought the more powder you add the more pressure you will have ... seems to me that the amount of powder is irrelevant as long as the velocities are low.
I always thought it is unsafe to start with min loads in magnum rifles, but I will try the min load for ELD-X bullets.
Assuming human error is not an option here, is there anything that can be wrong with the rifle itself?
