You might have to lower charge, or might not.
World class Target shooters USE 450s , been setting records for quite some time with them.
I loaded .223 almost exclusively with CCI Small Rifle Magnum for years, and use them interchangeably with CCI Nato primers, with absolutely zero difference in load data. In fact, there is no measurable difference over the chrony with either 300 BLK, or 223 between CCI small rifle magnum, standard small rifle, winchester small rifle, winchester nato, and Ft Smith (Murom) Small Rifle for an average velocity with the exception that the cheap Rusky primers produce a slightly better SD.
Yes, but that's beside my point. My point is that the difference between Mag and non-Mag is small enough that it's hard to detect unless you're already doing exceptional target work.
Understood , I guess I just take it for granted that if folks are concerned about the fine points different primers they are already at the exceptional target work already .
Load some, shoot some and see what works for you with your powder.
What scale are you using to load these rounds ?Generally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
Forgot that to include. The scale was my old and trusted Lyman (Ohaus) M5 and I dumped a charge and then trickled to desired weight. Just as a side note I periodically use check weights to check calibration of all my scales. The purpose was just to see which primers gave which velocities and which primers delivered the lowest standard deviation numbers. The brass, all LC 11 was sized and trimmed for uniformity. Additionally I also checked brass volume using the water method. The load data was taken from the Sierra 50th Anniversary manual. Again, the only purpose was to see which primers gave what velocities and gave the lowest standard deviations. As to the charge weight while I did want accuracy I was more concerned with precision as to a measure of repeatability, all charge weights identical. All variables as close to the same as I could get them.
I did this about 5 or 6 years ago.
Absolutely no problem. I welcome any other data or information and actually I agree but I used what I had. Maybe I'll get to it again. You are not being rude at all but merely offering up your thoughts which are most welcome. I also expected an ES to be maybe 10 or 15 FPS. I tried to get everything as uniform as possible. Back to the drawing boards.
Thanks for the table.Generally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
Generally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
Thanks for the table. I've been a doing lots of experiments. Many powder and bullGenerally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
Thanks for the table. I've been doing lots of experimenting. Many powder and bullet combos. The first bullet I tried was Bob's 55gr. FMJGenerally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
Thanks for the table.Generally I choose a primer, standard or magnum, based on the powder I am starting with. Using a flake or ball powder I generally run with a CCI 450 magnum primer (748, H414, H335, H380, and BL-C(2) for example), when starting with a stick powder I run with the CCI 400 standard primer. Basically this works for me in several rifles from AR to bolt.
The following were 10 shots over the chronograph. The loads were all H335 26.1 grains in LC 11 brass pushing a 53 grain Sierra BTHP match bullet. The rifle was my modified Rem 700 with a slow 1:12 twist.
View attachment 1020994
While all the 10 shot groups weren't bad the best group came from the CCI #41. The worst group was the BR 4. Since I was more concerned with getting them all over the chronograph the group sizes are subjective.
Ron
