7mm remington magnum reloading /all reloading

baltz526 · 04-01-2006, 06:17 AM

I found in my nosler #5 a load i have a practical question about.this is published data for all nosler 140gr bullets. with rl 22 powder. winchester cases, fedral 215 primers,maximum oal of 3.290" for all loads and powders. using the 140gr ballistic tip with a starting load of 63.5gr of rl22 the book lists a load density of 82% and 3160fps. the max load of 67.5gr of rl22 has a load density of 87% with 3340fps. now to the guts of it. any reloader can work up a load using this nosler data (from the starting load) and by monitoring things like case stretch, primer warning signs, accuracy, 15' muzzel velocity over a cronograph, case life and a few other pressure indicators. To create a load for there personal firearm. With rl22 using 87% of case capasity at its max nosler #5 book load in the 7mm remington magnum, there is room in the case to put more than book maximum. some would say, that this is a less thAN ideal powder for a 140gr nosler bullet. in the development of most cartrages, the idea was to use all case volume available for powder. and when a lot of the cartrages where first designed they had one powder in mind. in the 7mm remington magnum, that was h870 or the military equivulent. shooting 175gr bullets, at near 100% case capacity. with a cronograph today, we reloaders can judge the best powder for our rifles exactly. what i look for is a load that is accurate and shoots near the same 15' muzzle velocity every time, sometimes this load is above book maximum in my rifle, with a fuller case, closer to 100% case capasity, with no bad pressure signs on a hot day at the range.but for a saftey issue for a hunting load i will generally not use this type of load. here is why! at the range you have controled conditions, when out elk hunting in the snow and rain you have less control of the unknown, moisture build up from condesation rain snow inside the barrel, falling and getting snow or mud in the barrel, ect. from personal experience it will not take much to destroy a barrel when at or above book maximum, if a little moisture obstruction gets in the barrel. maximum loads at the range in controled conditions shooting targets, MAY BE SAFE. but to use these types of loads while hunting in uncontroled conditions is a personal choice to put yourself at risk.

freedom of choice is good

Weatherby · 04-01-2006, 08:28 AM

Great data Baltz526, I agree. I reload thousands of rounds every year and use the Nosler #5 book along with many others. I like to find a accurate load that performs to the game I'm hunting. We often go varmit hunting and the tempertures my be near 95 degrees. Pressures are way up compared to our mild tempertures here in the Valley. Nothing worst than getting to your hot varmit hunting spot and your cases stick in the chamber. Our hunting party always loads a little under maximun. We also fire so many rounds it doesn't take long to realize trimming center fire cases before reloading is a real pain. I like a load that has low pressure and no case streaching. If I trim case once every three or four years is about right. This is the experances of 6 reloading varmit hunters that honestly take over fifty rifles and 75,000 rounds for one week. So you can imagine how time consuming reloading might be if you have to trim each case. Pressures can blow your gun into splinters. Even a 22 magnum can blow the stock to peices !! We have seen it on a hot day. Its like anything do....do it in moderation. Hey and great choice on the 7 mag. I shoot my Weatherby 7mm wby magnum for a primary medium game rifle. Hard to beat the balistic coefficient, sectional density and energy. (Double throw me down mother!)

REEL HANDEL · 04-01-2006, 06:41 PM

I use this load in my custom built 7mm 98 mauser with douglas barrel 67gr. RL22 with 140 gr. nosler BT Fed-215 primer. with ww win cases. .513-5135 case size just a head of the belt. .750 ctc group. Vel. 3315 on chony.

baltz526 · 04-01-2006, 06:57 PM

how is the sd on velocity spread, my old h4831 load is not good in the pacnor custom barrel. with 140gr bullets

Weatherby · 04-01-2006, 08:40 PM

I love the 7's with any size case. I have great velocities and very low ES SD in my Weatherby 7mm wby. My two .140 grain partition bullet loads that have the best groups and velocities in my rifle are.

IMR 4350 powder-69 grains, Fed.215 primer, .140 Nosler Partition 3380 fps. 3/4 inch groups my favorite load for mule deer.

Reloader 22 powder-73.5 grains,Fed.215 primer,.140 Nosler Partition 3318 fps. 3/4 inch groups