reflex264
Handloader
- Jun 13, 2007
- 290
- 189
After reading the article in Shooting Times I was left scratching my head. The .264 failure was not based on fact. Gun press and a great deal of it from a man that never shot one (as he later admited) coupled with the intro of the 7 Rem Mag was a likely culprit. A deeper cause is at the root of it. The model 70 Westerner had an odd throat to say the least. It was designed around a 140gr dual diameter bullet. The from of the bullet from the case mouth out measures .257". The whole stunt was avoideding pressure spikes. Weatherby simply added some freebore to their guns problem solved. If the .264 was too much of a good thing how can more be better.
Through extensive load testing involving twist rates, barrel length and modern bullets and powders we know that a .264 throated like a Weatherby with a 27" barrel will reach 3400fps with a 130gr bullet. What boggles my mind is that Nosler uses a 24" barrel to test a cartridge that for years has shown it will get at least 100fps more from a 26" tube. Consider that the published data with 61grs of IMR7828 achieves 3153fps from the 24" wiseman test barrel. My son has a 1:9 douglas barrled gun that using the same load will achieve 3400fps. My 24" barreled Rem 700 which has the free bore type throat (Remington got that part right) using a pressure tested load of 68gr Ramshot Magnum breaks 3000fps with the 130 AB. 2 more grains of Magnum put it over 3100fps. So on a long range rifle how much harder is it to carry 3" more barrel? More later. reflex264
Through extensive load testing involving twist rates, barrel length and modern bullets and powders we know that a .264 throated like a Weatherby with a 27" barrel will reach 3400fps with a 130gr bullet. What boggles my mind is that Nosler uses a 24" barrel to test a cartridge that for years has shown it will get at least 100fps more from a 26" tube. Consider that the published data with 61grs of IMR7828 achieves 3153fps from the 24" wiseman test barrel. My son has a 1:9 douglas barrled gun that using the same load will achieve 3400fps. My 24" barreled Rem 700 which has the free bore type throat (Remington got that part right) using a pressure tested load of 68gr Ramshot Magnum breaks 3000fps with the 130 AB. 2 more grains of Magnum put it over 3100fps. So on a long range rifle how much harder is it to carry 3" more barrel? More later. reflex264