GT3_richy

I took this threads suggestions on board

I loaded some 165 Gamekings last week. From recollection QL suggested 45gr of RS52 would be 2520fps @ 44K, changing the burn rate to 0.5500 gave 2645 @ 53K - at the range 45gr gave 2657.

Well the good news is I'm still in one piece after firing the first 24 rounds I've ever made, yay...

I loaded 43gr to 47gr. I shot a dozen factory rounds first then my loads. At 46 and 46.5gr the cases looked mint, no marks on the heads and the bolt lift was light and silky still and extraction was effortless. I thought about this thread and decided to leave the 47gr in the box as I didn't want to ruin a good day!

Unfortunately I was late leaving home and in the rush managed to leave behind the Magnetospeed and cans (fortunately had ear plugs in the car). I'll load some more of the same and chrono them next week, groups were fairly consistent tbh, very little vertical spread, most were 2 touching and the 3rd a little off. I called about half of them due to moderator mirage or crap trigger work, it was also quite gusty toward the end of the afternoon. I've gotten used to firing my 204 and 223 the last 6 months so the 308's recoil is still a bit of a novelty so I'm sure there's plenty of room for improvement in my non-existent technique.

I've emailed RS to see what data they might be able to provide, they seem very pro-QL so I'm intrigued so see what they suggest.

Thanks again for the input in this thread, gents all of you.

.accuracy is sanity,velocity is vanity ! Enjoy. :-)

Hah, I've not heard that before. I will try and remember this ;p

George - thank you - I was mainly looking for 155 A-max data as that's what I'm loading first, my cbto length above was from the 155gr - not touched a 168 as yet

I did note that the 150gr Sierra was a BTHP, just wasn't sure how much difference the extra 5gr/any difference in length compared to the Amax might make. My mag length is way in excess of where the lands are with the 155gr, so went with 20-25 thou off (using OAL gauge/comparator) as a starting point. I will add the Litz article to my reading list!

Laurie - the main reason I asked on here was to find assurance or otherwise regarding QLs RS52 modelling. I will most certainly heed your advice and start at 43gr and see where I am at around 46gr.

Thank you both for taking the time to reply, much appreciated. As fun and interesting as reloading is, its quite daunting at the outset! I am most grateful for your input.

The closest they have data for is the Sierra 150gr. Being new to reloading I hoped someone would have real world data I could consider alongside QLs suggestions.

Anyone loading this combo able to suggest a reasonable starting charge weight please? barrel is 20" 1:12, using new Lapua brass, 155gr and 168gr Amax, CCI BR2s. CBTO 2.222 which is a nats over 20 thou off lands.

Cheers,

Rich

Looks mint - whats the actual weight of the bare chassis?

Very tasty pal, surprised it was only a 3 month waiting - got the impression it was way longer if at all!

Another vote for traps and peanut butter. And some good airgun sport with NV/thermal