Category: Hunting

(Continued from Part 4.) Temperature Stable Powders I will use temperature stable powder in these rifles so that during summer time temperatures, my previously safe-to-shoot cartridges is not adversely affected by an increase ambient air temperature or while chambered in a hot rifle barrel. H4895, H4831, H4350, and Varget are my top choices. I engineer a wide margin of safety for powders that are not temperature stable and settle on a lesser weight charge. Accuracy can often be found at lower pressures when using lighter projectiles and at higher pressures if using heavier projectiles. Good accuracy for lighter projectiles is …

(Continued from Part 3.) In my opinion, regardless if the chambering is .300 Savage, or .308 Winchester, or .30-06, using a temperature-stable powder at charge that delivers a muzzle velocity of 2,150 fps to propel a .308 150 grain round nosed bullet designed for the .30-30 is the safest practical load I could put together and recommend if the reloader is primarily interested in safety. As an example in the extreme to illustrate that a larger case capacity is more desirable in antique actions. If it were chambered in .30-06, 35 grains of IMR3031 behind a 150-grain round nosed bullet …

(Continued from Part 2.) Sizing the Brass to the Chamber Assuming we have had a gunsmith evaluate the rifle, we should also fit the case to the chamber by backing out the die a full turn so that the shoulder of the case might be more than 1 to 2 thousandths of an inch longer. This process will compensate for the generous head spacing that exists in military actions coupled with the original military barrel, and remove any remaining and unneeded head space variance out of a re-barreled action. Accuracy might also be improved. The bolt should not close without …

(Continued from Part 1.) Pressure Limits, PSI, CIP, and CUP How many PSI are in a CUP? And to continue the absurdity, how many CIP’s of PSI are in a CUP? Could we be more baffled and confused? Yes! And this is all the comedic relief we can expect. To include CIP into our calculus is unnecessary, yet it is mentioned only to note that it is a competing metric used in European manuals and can be a source of additional confusion. Some of the false assumptions about the pressure limits of the Swedish Mauser may lie in the inaccurate …

(Continued from Part 5. This concludes the article.) In the ballistic charts that follow, the best zero for each type of ammunition is determined and we can see how much to our advantage it is to determine the actual trajectory of the ammunition and find the zero that makes the best use of it’s flat trajectory. I used the JBM ballistics calculator and the manufacturers data to find out what the true maximum point black range is when using a 24 inch barrel. The following data (and much more) can also be found at the highly-recommended  JBM Ballistic Calculator website. …

(Continued from Part 4.) More on the 6.5 Creedmoor In its development, many aspects of the 6.5 Creedmoor were combined to produce a very accurate cartridge. The 6.5×55 barrel twist rate is 7.8:1 and the twist rate for most 6.5CM rifles during its introduction was 8:1. This is ideal for the heavier 140 to 160 grain 6.5mm projectiles that give both of these 6.5 cartridges very desirable ballistic properties and fine accuracy. The long bearing surface of heavy-for-caliber bullets impart stability inside the barrel and outside the barrel as yaw rates are lower and the bullet settles down and could …

(Continued from Part 3.) 7×57 Mauser Here is one good 7×57 Mauser load: Federal Power-Shok Jacketed Soft Point 175 Grain 7mm Mauser.  It has a muzzle velocity of 2,390 fps. 6.5×55 Swedish Mauser My preferred roundnose 6.5×55 Swedish Mauser load uses a Hornady 160 grain RN at 2,400 fps. Round nosed bullets are falling into disuse. I was only able to find one manufacturer offering loaded 6.5×55 round nosed soft point ammunition and it was at an excessively high price. Reloaders have either Hornady or Sierra RN bullets to choose from. I have plenty in stock. Brace for sticker shock …

(Continued from Part 2.) Two .30 Caliber Big Game Hunting Loads My bolt action rifles are in two separate groups, precision rifles, and hunting rifles. All of my 6.5mm rifles are precision rifles capable of extreme long-range shooting. They will be handled with care and not bumped around while hunting. They are too valuable because of what they can do. Of course, the ammunition they use can also be used on deer out to 300 yards, and elk in a pinch with well-placed shots inside of 200 yards, yet they are not suitable for bear and elk when the angle …