I don't handload yet but I know a guy who wants to teach me how. Do you think some 100 gr. Varminter 7mm bullets would work well out of the 7mm Rem Mag for coyotes? And what do you think the ballistics as far as speed would look like?
In my experience the 100gr bullet in a 7mm rem.mag is just too short and leaves you way too far from the lands for good varmint class accuracy.As to fps,you can get about 3500to 3650fps.The 120gr at about 3300+fps works better and is devestating as a varmint bullet.I use the Sierra Match King 130gr hpbt with IMR4350 at 3200+fps.Maybe 100gr bullets will work for you.They just didnt get the accuracy I get with 130,s. sam.
Barnes makes all copper bullets which to Sam's point will be bigger (longer) for the same bullet weight. However, I checked and they don't make the .284 at less than 120 grains. I have no experience with how accurate these things are. BC is not bad at .373 for the 120. Could be a bit costly though!
A word of caution when loading 7mm rem mag or any other high powder capacity casing for hunting where the temperature is 20deg. or below.While standard primers work well at 60deg,when it gets cold,to avoid a hangfire like happened to me once in Colorado at -4 deg, use magnum primers.I advise watching very closely,what primers they are using in the load books,and even if they are using standard primers,if you are using high powder capacity cartridges with slow burning powder,even if they work well at moderate temps,use mag primers in hunting loads if you know it is going to be cold.I use standard primers for all target practice in warm weather because they ignite powder ok and they arent near as rough on primer pockets.Back in the seventy,s we had cold weather and often heard of and experienced delayed or hangfire.I also use mag primers when the powder charge gets around 65gr and larger.Even .30-06 type cases will benefit with use of mag primers in extreme cold.The books dont cover this as good as they should but there are articles on it and I advise reading it.When switching from standard to mag primers,reduce your powder by at least one grain.Also,be sure to clean the ignition hole. sam.
I used to load Speer 120 grain bullets out to 3500+ fps, they were accurate and made bunny rabbits literally explode with a center hit, nothing but head and feet left. Good times.
You dont have to take anyone,s word for whether mag primers open up primer pockets,just use them for a while. sam.
I use nothing but Fed. 215s, the smallest gun I load for now is an STW so mags work fine, burned thousands over the years. I never noticed any problems of any kind. I've also used thousands of standard primers in standard calibers. Although to be honest I only use my brass 5-6 times max. Are you talking makeing the primer fit loosely or erosion to the flash hole?
I dont have any trouble with using magnum primers in my non mag cartridges. Been doing it for years and have noticed no ill effects from it. I found it much easier to just buy 1 type of primer for all my large centerfire rifle cartridges. You may notice that some max loads listed in manuals for non mag cartridges, list a mag primer for a particular load.If you develope a load using a mag primer, how can there be a pressure issue if you keep everything sane?
I was dead certain someone would tell me that they had used mags for years with no problem.I am happy for you,keep on doing it.If I hunted anywhere that was below 20deg.,I would use mag primers too. sam.
